Date: Thu, 28 Jan 2016 19:22:22 +0000 From: bugzilla-noreply@freebsd.org To: freebsd-amd64@FreeBSD.org Subject: [Bug 206716] HPN-SSH: getsockopt(SO_SNDBUF) returns high watermark, not setsockopt(SO_SNDBUF) Message-ID: <bug-206716-6@https.bugs.freebsd.org/bugzilla/>
next in thread | raw e-mail | index | archive | help
https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D206716 Bug ID: 206716 Summary: HPN-SSH: getsockopt(SO_SNDBUF) returns high watermark, not setsockopt(SO_SNDBUF) Product: Base System Version: 10.1-RELEASE Hardware: amd64 OS: Any Status: New Severity: Affects Only Me Priority: --- Component: bin Assignee: freebsd-bugs@FreeBSD.org Reporter: chris-freebsd-bugs@stankevitz.com CC: freebsd-amd64@FreeBSD.org CC: freebsd-amd64@FreeBSD.org getsockopt(SO_SNDBUF) does not return the value set by getsockopt(SO_SNDBUF= ). HPN-SSH would like to determine the value set by setsockopt(SO_SNDBUF) so t= hat it can fill it up. This helps to use more bandwidth on a high BDP link. HPN-SSH tries to determine this value by periodically calling getsockopt(SO_SNDBUF) at [1]. However, on FreeBSD, getsockopt(SO_SNDBUF) do= es not return the value set by setsockopt(SO_SNDBUF). Rather it returns the "= high watermark". The net result is that on high BDP links, HPN-SSH does nothing to increase bytes-in-flight. [1] /usr/src/crypto/openssh/roaming_common.c line 59 in get_snd_buf_size: getsockopt(fd, SOL_SOCKET, SO_SNDBUF, &optval, &optvallen) --=20 You are receiving this mail because: You are on the CC list for the bug.=
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?bug-206716-6>