Hello,
Please identify any false statements (particularly statement 7 which
accuses FreeBSD 10.1 of having a bug):
1. openssh limits the size of "the outgoing buffer" to 65KB
2. (1) limits bandwidth on high BDP links.
3. FreeBSD 10.1 supplied openssh/HPN tries to fix (2) by increasing the
size of "the outgoing buffer" to match the SO_SNDBUF capacity
4. openssh/HPN accomplishes (3) by periodically calling
getsockopt(SO_SNDBUF)
5. In FreeBSD 10.1, getsockopt(SO_SNDBUF) does not return the value set
by setsockopt(SO_SNDBUF). Instead it reports the high watermark of the
outgoing buffer.
6. (3) does nothing because of (4) and (5)
7. There is a bug in FreeBSD 10.1 networking or FreeBSD 10.1 supplied
openssh/HPN:
7a. FreeBSD bug: getsockopt(SO_SNDBUF) does not return value set by
setsockopt(SO_SNDBUF)
7b. openssh/HPN bug: do not use getsockopt(SO_SNDBUF) to get the value
set by setsockopt(SO_SNDBUF) -- use something else
Original thread from August 2015:
https://www.mail-archive.com/freebsd-net@freebsd.org/msg49793.html
Thank you,
Chris
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