netdev - Re: [PATCH] Disable rp_filter for IPsec packets

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, 14 Mar 2011 18:23:20 -0400
From:	Michael Smith <msmith@...co.com>
To:	netdev@...r.kernel.org
Subject: Re: [PATCH] Disable rp_filter for IPsec packets

David Miller wrote:

> Existing arguments might be large enough to carry more than one piece
> of information :-)

If it's encoded into another argument, would there be more overhead from 
bit-shifting it out than you'd save by losing an argument?

>> I might split the RPF out from the spec_dst calculation, move the
>> whole lot into net/ipv4/route.c, and only do the fib_lookup() if RPF
>> is enabled or CONFIG_IP_ROUTE_CLASSID (i.e. we need to know the itag).
> 
> Can't split two two things up, because spec_dst is a product of the
> reverse FIB lookup, in the form of FIB_RES_PREFSRC().

True, but the result of the reverse FIB lookup could be passed around.

Mike
--
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