[lkml]   [2018]   [Sep]   [13]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
Messages in this thread
SubjectRe: [PATCH 1/1] ipv6: Add sockopt IPV6_MULTICAST_ALL analogue to IP_MULTICAST_ALL
From: Andre Naujoks <>
Date: Mon, 10 Sep 2018 10:27:15 +0200

> The socket option will be enabled by default to ensure current behaviour
> is not changed. This is the same for the IPv4 version.
> A socket bound to in6addr_any and a specific port will receive all traffic
> on that port. Analogue to IP_MULTICAST_ALL, disable this behaviour, if
> one or more multicast groups were joined (using said socket) and only
> pass on multicast traffic from groups, which were explicitly joined via
> this socket.
> Without this option disabled a socket (system even) joined to multiple
> multicast groups is very hard to get right. Filtering by destination
> address has to take place in user space to avoid receiving multicast
> traffic from other multicast groups, which might have traffic on the same
> port.
> The extension of the IP_MULTICAST_ALL socketoption to just apply to ipv6,
> too, is not done to avoid changing the behaviour of current applications.
> Signed-off-by: Andre Naujoks <>
> Acked-By: YOSHIFUJI Hideaki <>

Applied to net-next, thank you.

 \ /
  Last update: 2018-09-13 17:18    [W:0.057 / U:1.036 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site