On 15 February 2012 13:11, Fernando Gont wrote:
> Folks,
>
> There seems to be a bug in the setting of the IPv6 Flow Label for TCP
> connections.
>
> When an incoming connection is received, the SYN/ACK is always sent with
> the FL set to zero.
>
> It seems that syn_cache_respond() and syn_cache_add() should be patched,
> together with the SYN-cookies generation function (as you need to
> remember the FL you used for the SYN/ACK, since the FL is supposed to
> remain constant during the life of the connection).
>
> Might be able to produce a patch in a couple of weeks, but mentioned it
> in the event anyone else finds some cycles before I do.
>
I'm a bit ignorant about IPv6, but that is the same case for TCCLASS,
I had fixed the TOS for ipv4 and I had an untested diff for ipv6. The
thing is
On 15 February 2012 13:11, Fernando Gont wrote:
> Folks,
>
> There seems to be a bug in the setting of the IPv6 Flow Label for TCP
> connections.
>
> When an incoming connection is received, the SYN/ACK is always sent with
> the FL set to zero.
>
> It seems that syn_cache_respond() and syn_cache_add() should be patched,
> together with the SYN-cookies generation function (as you need to
> remember the FL you used for the SYN/ACK, since the FL is supposed to
> remain constant during the life of the connection).
>
> Might be able to produce a patch in a couple of weeks, but mentioned it
> in the event anyone else finds some cycles before I do.
>
I'm a bit ignorant about IPv6, but that is the same case for TCCLASS,
I had fixed the TOS for ipv4 and I had an untested diff for ipv6. The
thing is struct ip6_pktopts *opt is NULL in ip6_output() from
syn_cache_respond():
error = ip6_output(m, NULL /*XXX*/, (struct route_in6 *)ro, 0,
(struct ip6_moptions *)0, NULL, NULL);
I didn't want to touch it much since I'm not fully aware of the consequences.
> Thanks,
> --
> Fernando Gont
> e-mail: ferna...@gont.com.ar || fg...@si6networks.com
> PGP Fingerprint: 7809 84F5 322E 45C7 F1C9 3945 96EE A9EF D076 FFF1
>
> Thanks,
> --
> Fernando Gont
> e-mail: ferna...@gont.com.ar || fg...@si6networks.com
> PGP Fingerprint: 7809 84F5 322E 45C7 F1C9 3945 96EE A9EF D076 FFF1
