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  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, 22 Dec 2014 12:18:39 -0800
From:	Alex Gartrell <agartrell@...com>
To:	Herbert Xu <herbert@...dor.apana.org.au>
CC:	<jasonwang@...hat.com>, <davem@...emloft.net>,
	<netdev@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
	<mst@...hat.com>, <herbert@...dor.apena.org.au>,
	<kernel-team@...com>
Subject: Re: [RFC PATCH net-next] tun: support retrieving multiple packets
 in a single read with IFF_MULTI_READ

Hey Herbert,

Thanks for getting back to me

On 12/22/14 4:09 AM, Herbert Xu wrote:
> As tun already has a socket interface can we do this through
> recvmmsg?

This just presents an easier interface (IMHO) for accomplishing that. 
And I say easier because I was unable how to figure out the recvmmsg way 
to do it.

While fully aware that this makes me look like an idiot, I have to admit 
that I've tried and failed to figure out how to get a socket fd out of 
the tun device.

The regular fd doesn't work (which is obvious when you look at the 
implementation sock_from_file), there's a tun_get_socket function but 
it's only referenced by a single file, and none of the ioctl's jump out 
at me as doing anything to enable this behavior.  Additionally, 
tuntap.txt makes no mention of sockets specifically.

FWIW, I don't feel strongly that IFF_MULTI_READ is the right way to do 
this either.

Thanks,
-- 
Alex Gartrell <agartrell@...com>

--
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/

Powered by blists - more mailing lists