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Date: Tue, 20 Mar 2007 10:27:51 +0200 (EET) From: Pekka Savola <pekkas@...core.fi> To: David Miller <davem@...emloft.net> cc: kaber@...sh.net, netdev@...r.kernel.org Subject: Re: 2.6.20.3-rc1 / iproute2 hoplimit 2^32-1 vs 2^8-1 On Mon, 19 Mar 2007, David Miller wrote: > From: Patrick McHardy <kaber@...sh.net> > Date: Mon, 19 Mar 2007 16:27:29 +0100 > >> Mhh actually this looks intentional: >> >> icmpv6_send and some other output functions do: >> int hlimit; >> ... >> if (hlimit < 0) >> hlimit = dst_metric(dst, RTAX_HOPLIMIT); >> if (hlimit < 0) >> hlimit = ipv6_get_hoplimit(dst->dev); > > Yep, negative value has a specific meaning. Which seems to indicate that the kernel-internal implementation has a need to store a negative TTL. Reporting it to the userspace as a negative doesn't seem right though? -- Pekka Savola "You each name yourselves king, yet the Netcore Oy kingdom bleeds." Systems. Networks. Security. -- George R.R. Martin: A Clash of Kings - To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
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