Date: Mon, 10 Apr 2000 00:15:20 -0600
From: Richard Gooch <rgooch@ras.ucalgary.ca>
Hi, all. For at least a month or two I've noticed that FIONREAD
yields 1 byte on a freshly closed TCP connection, rather than 0.
The server creates a socket, binds to a port and listens and
accepts the first connection. It does a select(2) on the FD, and
upon an input event, calls ioctl(2) with FIONREAD. This yields 1
byte readable. Any attempt to read that byte fails, as it's not
really there.
It's the sequence byte taken up by the initial SYN. It's probably
wrong.
I don't know if other systems report it this way too, do you have a
way to check this out?
Later,
David S. Miller
davem@redhat.com
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