linux-kernel - Re: [patch v2, kernel version 3.2.1] net/ipv4/ip

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]

Message-ID: <20120117095049.GG1077372@jupiter.n2.diac24.net>
Date:	Tue, 17 Jan 2012 10:50:49 +0100
From:	David Lamparter <equinox@...c24.net>
To:	Štefan Gula <steweg@...t.sk>
Cc:	David Lamparter <equinox@...c24.net>,
	Alexey Kuznetsov <kuznet@....inr.ac.ru>,
	"David S. Miller" <davem@...emloft.net>,
	James Morris <jmorris@...ei.org>,
	Hideaki YOSHIFUJI <yoshfuji@...ux-ipv6.org>,
	Patrick McHardy <kaber@...sh.net>, netdev@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: Re: [patch v2, kernel version 3.2.1] net/ipv4/ip_gre: Ethernet
 multipoint GRE over IP

On Mon, Jan 16, 2012 at 11:52:25PM +0100, Štefan Gula wrote:
> Dňa 16. januára 2012 21:29, David Lamparter <equinox@...c24.net> napísal/a:
> > At the risk of repeating myself, Linux GRE support already has
> > provisions for multipoint tunnels. And unlike your code, those reuse the
> > existing neighbor table infrastructure, including all of its user
> > interface and introspection capabilities.
> >
> > It's actually slightly visible in your patch:
> >
> > On Mon, Jan 16, 2012 at 08:45:14PM +0100, Štefan Gula wrote:
> >> +++ linux-3.2.1-my/net/ipv4/ip_gre.c  2012-01-16 20:42:03.000000000 +0100
> >> @@ -716,7 +942,19 @@ static netdev_tx_t ipgre_tunnel_xmit(str
> > [...]
> >>               /* NBMA tunnel */
> >>
> >>               if (skb_dst(skb) == NULL) {
> >
> >
> > -David
> 
> That code you are referring to is used only for routed traffic inside
> GRE - L3 traffic over L3 routed infrastructure. My patch is dealing
> with L2 traffic over L3 routed infrastructure - so the decision here
> is based on destination MAC addresses and not based on IPv4/IPv6
> addresses.

Yes, it currently only does IPv4/IPv6 -> IPv4 through the neighbor
table. That doesn't mean it can't be extended to handle ethernet
addresses the same way.


-David
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/