Subject: Re: IPv4 multicast set/getsockopt, specifying interface index
From: None <email@example.com>
Date: 01/13/2001 13:05:58
> the following patch uses 0.0.0.0/8 as 24bit interface index value.
> on getsockopt(IP_MULTICAST_IF) it will return the value the user has
> set. does it look right, or messy?
a question remains to me - how can we identify a system with this
feature, and a system without feature. this is messy...
/* ifindex = x is known to be there */
if (setsockopt(IP_MULTICAST_IF, 0.0.0.x) < 0)
/* no support */
/* supports it */