Date: Sun, 27 Sep 2015 12:26:48 +0000 (UTC) From: "Bjoern A. Zeeb" <bz@FreeBSD.org> To: "Alexander V. Chernikov" <melifaro@FreeBSD.org>, George Neville-Neil <gnn@FreeBSD.org> Cc: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: Re: svn commit: r288301 - in head/sys: net netinet netinet6 Message-ID: <alpine.BSF.2.00.1509271225300.92377@ai.fobar.qr> In-Reply-To: <201509270529.t8R5TYRf095540@repo.freebsd.org> References: <201509270529.t8R5TYRf095540@repo.freebsd.org>
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On Sun, 27 Sep 2015, Alexander V. Chernikov wrote: > Author: melifaro > Date: Sun Sep 27 05:29:34 2015 > New Revision: 288301 > URL: https://svnweb.freebsd.org/changeset/base/288301 > > Log: > Eliminate nd6_nud_hint() and its TCP bindings. > > Initially function was introduced in r53541 (KAME initial commit) to > "provide hints from upper layer protocols that indicate a connection > is making "forward progress"" (quote from RFC 2461 7.3.1 Reachability > Confirmation). > However, it was converted to do nothing (e.g. just return) in r122922 > (tcp_hostcache implementation) back in 2003. Some defines were moved > to tcp_var.h in r169541. Then, it was broken (for non-corner cases) > by r186119 (L2<>L3 split) in 2008 (NULL ifp in nd6_lookup). So, > right now this code is broken and has no "real" base users. > > Differential Revision: https://reviews.freebsd.org/D3699 PR: 165692 It would be nice to have the feature back though it would be very expensive locking wise if it'd remain a per-packet operation. -- Bjoern A. Zeeb "Come on. Learn, goddamn it.", WarGames, 1983
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