Date: Wed, 3 Apr 1996 17:01:35 -0600 (CST) From: Joe Greco <jgreco@brasil.moneng.mei.com> To: fenner@parc.xerox.com (Bill Fenner) Cc: hackers@freebsd.org Subject: Re: SO_KEEPALIVE - New feature patch enclosed. Message-ID: <199604032301.RAA00745@brasil.moneng.mei.com> In-Reply-To: <96Apr3.143103pst.177475@crevenia.parc.xerox.com> from "Bill Fenner" at Apr 3, 96 02:30:58 pm
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> While we're on this topic, someone asked in comp.protocols.tcp-ip about tuning
> the keepalive timer[...]
> [...]
> We already have net.inet.tcp.{keepidle,keepintvl} but it might be worth
> thinking about adding the TCP_KEEPALIVE socket option.
Uh, uh, uh, HUH? Check the message you're replying to, for a patch that
does precisely that. I created a "net.inet.tcp.keepalive", that if set to a
nonzero value, sets the SO_KEEPALIVE flag on new sockets as they are
created, on a systemwide basis.
I think it's even done almost correctly.
The intended application is ISP's and other sites where large numbers of
session hangs may happen...
> P.S. Is it documented anywhere that net.inet.tcp.{keepidle,keepintvl} are in
> units of 500ms? Should it be?
I did not see any such documentation. My keepalive mod is similarly
undocumented... I have no idea where to document it.
... Joe
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Joe Greco - Systems Administrator jgreco@ns.sol.net
Solaria Public Access UNIX - Milwaukee, WI 414/546-7968
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