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

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:	Mon, 19 Mar 2007 16:27:29 +0100
From:	Patrick McHardy <kaber@...sh.net>
To:	Pekka Savola <pekkas@...core.fi>
CC:	netdev@...r.kernel.org
Subject: Re: 2.6.20.3-rc1 / iproute2 hoplimit 2^32-1 vs 2^8-1

Patrick McHardy wrote:
> Pekka Savola wrote:
> 
>>On kernel based on 2.6.20.3-rc1 (FC6), 'ip -6 r l' shows:
>>
>>default via fe80::212:f0ff:fe5f:c4ec dev eth1  proto kernel  metric
>>1024  expires 7191sec mtu 1500 advmss 1440 hoplimit 4294967295
>>
>>(this is the same with iproute2-ss061214 and iproute2-ss070313.)
>>
>>So, it seems that the data length for hoplimit is not quite right, or
>>it's reported as 2^32-1 instead of 2^8-1...
> 
> 
> 
> Does this fix it?


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);

-
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