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Subject: Re: [PATCH 2/5] AF_UNIX: enable/disable multicast with
 getsockopt/setsockopt
From: Eric Dumazet <eric.dumazet@gmail.com>
To: Alban Crequy <alban.crequy@collabora.co.uk>
Cc: "David S. Miller" <davem@davemloft.net>,
        Stephen Hemminger <shemminger@vyatta.com>,
        Cyrill Gorcunov <gorcunov@openvz.org>,
        Alexey Dobriyan <adobriyan@gmail.com>,
        Lennart Poettering <lennart@poettering.net>,
        Kay Sievers <kay.sievers@vrfy.org>,
        Ian Molton <ian.molton@collabora.co.uk>, netdev@vger.kernel.org,
        linux-kernel@vger.kernel.org, dbus@freedesktop.org
In-Reply-To: <1285349116-17529-2-git-send-email-alban.crequy@collabora.co.uk>
References: <20100924182257.11abd9a6@chocolatine.cbg.collabora.co.uk>
	 <1285349116-17529-2-git-send-email-alban.crequy@collabora.co.uk>
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Date: Fri, 24 Sep 2010 19:46:28 +0200
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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@collabora.co.uk>


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

u->multicast = !!val;