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From:   Callum Sinclair <callum.sinclair@alliedtelesis.co.nz>
To:     dsahern@kernel.org, nikolay@nvidia.com
Cc:     netdev@vger.kernel.org, linux-kernel@vger.kernel.org,
        linus.luessing@c0d3.blue,
        Callum Sinclair <callum.sinclair@alliedtelesis.co.nz>
Subject: [PATCH] net: Allow any address multicast join for IP sockets
Date:   Tue,  6 Jul 2021 13:15:47 +1200
Message-Id: <20210706011548.2201-1-callum.sinclair@alliedtelesis.co.nz>
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For an application to receive all multicast packets in a range such as
224.0.0.1 - 239.255.255.255 each multicast IP address has to be joined
explicitly one at a time.

Allow the any address to be passed to the IP_ADD_MEMBERSHIP and
IPV6_ADD_MEMBERSHIP socket option per interface. By joining the any
address the socket will receive all multicast packets that are received
on the interface.=20

This allows any IP socket to be used for IGMP or MLD snooping.

Callum Sinclair (1):
  net: Allow any address multicast join for IP sockets

 net/ipv4/igmp.c  | 40 ++++++++++++++++++++++++++++++++--------
 net/ipv6/mcast.c | 20 ++++++++++++++------
 2 files changed, 46 insertions(+), 14 deletions(-)

--=20
2.32.0