Date: Mon, 26 Nov 2012 14:23:22 +0900 (JST) From: Hiroki Sato <hrs@FreeBSD.org> To: yanegomi@gmail.com Cc: freebsd-net@FreeBSD.org Subject: Re: net.inet6.icmp6.nd6_useloopback - what is it supposed to do? Message-ID: <20121126.142322.2280620686470349020.hrs@allbsd.org> In-Reply-To: <CAGH67wQWu2PZGcORsiSz3_r%2BmjsDv=Fx9-ijbEJQv8jbt7a7bg@mail.gmail.com> References: <CAGH67wQWu2PZGcORsiSz3_r%2BmjsDv=Fx9-ijbEJQv8jbt7a7bg@mail.gmail.com>
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----Security_Multipart(Mon_Nov_26_14_23_22_2012_258)-- Content-Type: Text/Plain; charset=us-ascii Content-Transfer-Encoding: 7bit Garrett Cooper <yanegomi@gmail.com> wrote in <CAGH67wQWu2PZGcORsiSz3_r+mjsDv=Fx9-ijbEJQv8jbt7a7bg@mail.gmail.com>: ya> Hi, ya> I've been TAHI testing FreeBSD 7.x sources for the past couple ya> months and over the course of my testing via the TAHI IPv6 conformance ya> test, I changed the knob value from net.inet6.icmp6.nd6_useloopback=1 ya> -> net.inet6.icmp6.nd6_useloopback=0 and ran into a slew of errors ya> with the addr.p2 phase-1 TAHI tests. ya> I was wondering if someone could describe what the beforementioned ya> sysctl is supposed to do from a functional perspective, how it might ya> tie into other IPv6 RFCs (if applicable), and if disabled how it would ya> affect a system with IPv6 enabled. It is for whether a loopback address (::1) is used as the destination for traffic toward one of the locally-configured IPv6 addresses. In the original implementation it is in rtrequest(), but the current FreeBSD's one it just means if a loopback route will be installed or not upon the lo0 interface initialization, not in RTM_RESOLVE. So, if setting nd6_useloopback to 0, no loopback route will be installed and some THAI test will fail, I think. -- Hiroki ----Security_Multipart(Mon_Nov_26_14_23_22_2012_258)-- Content-Type: application/pgp-signature Content-Transfer-Encoding: 7bit -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.11 (FreeBSD) iEYEABECAAYFAlCy/MoACgkQTyzT2CeTzy1iHwCfSveop9OJXh4yhfeE2smZMDJR aU0AoMZqDDBaE6brlgZR36khoYD81uss =EHiF -----END PGP SIGNATURE----- ----Security_Multipart(Mon_Nov_26_14_23_22_2012_258)----
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