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From: Andrew Lunn <andrew@lunn.ch>
To: Dongpo Li <lidongpo@hisilicon.com>
Cc: netdev <netdev@vger.kernel.org>
Subject: Re: question about function igmp_stop_timer() in net/ipv4/igmp.c
Date: Tue, 25 Oct 2016 14:19:36 +0200	[thread overview]
Message-ID: <20161025121936.GI22417@lunn.ch> (raw)
In-Reply-To: <580F471D.5050204@hisilicon.com>

> Otherwise the host can't send IGMP leave message when it leaves the
> group because the im->reporter is 0.

Leave is optional for IGMP v2, so net sending it is fine. And only a
querier is going to take any notice of it.

What happens when you have a querier in your network and you are using
IGMPv3. That is the use case which matters.

     Andrew

      reply	other threads:[~2016-10-25 12:19 UTC|newest]

Thread overview: 6+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2016-10-24 11:50 question about function igmp_stop_timer() in net/ipv4/igmp.c Dongpo Li
2016-10-24 15:32 ` Andrew Lunn
2016-10-25  1:13   ` Dongpo Li
2016-10-25  7:39     ` Andrew Lunn
2016-10-25 11:50       ` Dongpo Li
2016-10-25 12:19         ` Andrew Lunn [this message]

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