netdev - Re: [PATCH 2/5] AF_UNIX: enable/disable multicast with getsockopt/setsockopt

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Message-ID: <1285350388.2478.0.camel@edumazet-laptop>
Date:	Fri, 24 Sep 2010 19:46:28 +0200
From:	Eric Dumazet <eric.dumazet@...il.com>
To:	Alban Crequy <alban.crequy@...labora.co.uk>
Cc:	"David S. Miller" <davem@...emloft.net>,
	Stephen Hemminger <shemminger@...tta.com>,
	Cyrill Gorcunov <gorcunov@...nvz.org>,
	Alexey Dobriyan <adobriyan@...il.com>,
	Lennart Poettering <lennart@...ttering.net>,
	Kay Sievers <kay.sievers@...y.org>,
	Ian Molton <ian.molton@...labora.co.uk>,
	netdev@...r.kernel.org, linux-kernel@...r.kernel.org,
	dbus@...edesktop.org
Subject: Re: [PATCH 2/5] AF_UNIX: enable/disable multicast with
 getsockopt/setsockopt

Le vendredi 24 septembre 2010 à 18:25 +0100, Alban Crequy a écrit :
> Multicast can be enabled or disabled after a socket is allocated but this
> cannot be changed once the socket is bound or connected.
> 
> Userspace applications can enable multicast on an Unix stream socket:
>   sockfd = socket(AF_UNIX, SOCK_STREAM, 0);
>   #define UNIX_MULTICAST 1
>   val = 1;
>   len = sizeof(val);
>   ret = setsockopt(sockfd, 0, UNIX_MULTICAST, &val, len);
> 
> Signed-off-by: Alban Crequy <alban.crequy@...labora.co.uk>


> +		if (val != 0) {
> +			u->multicast = 1;
> +		} else {
> +			u->multicast = 0;
> +		}

u->multicast = !!val;



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