Re: 2.6.20.3-rc1 / iproute2 hoplimit 2^32-1 vs 2^8-1

[Pekka Savola]

On Mon, 19 Mar 2007, David Miller wrote:
From: Patrick McHardy <[EMAIL PROTECTED]>
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
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