Kernel sends multicast groups to sockets that did not subscribe to the MC group

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From: Christoph Lameter

Subject: Kernel sends multicast groups to sockets that did not subscribe to the MC group

Date: Monday, April 13, 2009 - 2:06 pm

I ran two processes listening to two multicast groups:

One listening for 239.0.0.51 and the other on 239.0.0.50. Both are
listening on the same port.

If I send a multicast message to 239.0.0.50 then both receive it. Why is
the process listening to 239.0.0.51 receiving the multicast message send
to 239.0.0.50?


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Messages in current thread:

Kernel sends multicast groups to sockets that did not subs ..., Christoph Lameter, (Mon Apr 13, 2:06 pm)

Re: Kernel sends multicast groups to sockets that did not ..., Neil Horman, (Tue Apr 14, 6:25 am)

Re: Kernel sends multicast groups to sockets that did not ..., Christoph Lameter, (Tue Apr 14, 6:53 am)

Re: Kernel sends multicast groups to sockets that did not ..., Neil Horman, (Tue Apr 14, 11:27 am)

Re: Kernel sends multicast groups to sockets that did not ..., Christoph Lameter, (Tue Apr 14, 11:33 am)

[PATCH] Multicast: Avoid useless duplication of multicast ..., Christoph Lameter, (Tue Apr 14, 11:48 am)

Re: Kernel sends multicast groups to sockets that did not ..., Neil Horman, (Tue Apr 14, 1:01 pm)

Re: Kernel sends multicast groups to sockets that did not ..., Christoph Lameter, (Tue Apr 14, 1:16 pm)

Re: [PATCH] Multicast: Avoid useless duplication of multic ..., Neil Horman, (Tue Apr 14, 1:44 pm)

Re: [PATCH] Multicast: Avoid useless duplication of multic ..., Christoph Lameter, (Tue Apr 14, 2:45 pm)

Re: [PATCH] Multicast: Avoid useless duplication of multic ..., Neil Horman, (Wed Apr 15, 4:07 am)

Re: [PATCH] Multicast: Avoid useless duplication of multic ..., Christoph Lameter, (Wed Apr 15, 5:51 am)

Re: [PATCH] Multicast: Avoid useless duplication of multic ..., Neil Horman, (Wed Apr 15, 7:22 am)

Re: [PATCH] Multicast: Avoid useless duplication of multic ..., Vlad Yasevich, (Wed Apr 15, 7:41 am)

Re: [PATCH] Multicast: Avoid useless duplication of multic ..., Neil Horman, (Wed Apr 15, 8:57 am)

Re: [PATCH] Multicast: Avoid useless duplication of multic ..., Vlad Yasevich, (Wed Apr 15, 9:07 am)

Re: [PATCH] Multicast: Avoid useless duplication of multic ..., Neil Horman, (Wed Apr 15, 9:38 am)

Re: [PATCH] Multicast: Avoid useless duplication of multic ..., Vlad Yasevich, (Wed Apr 15, 10:19 am)

Re: [PATCH] Multicast: Avoid useless duplication of multic ..., Neil Horman, (Wed Apr 15, 10:53 am)

Re: [PATCH] Multicast: Avoid useless duplication of multic ..., Christoph Lameter, (Wed Apr 15, 12:17 pm)

Re: [PATCH] Multicast: Avoid useless duplication of multic ..., Christoph Lameter, (Wed Apr 15, 12:21 pm)

Re: [PATCH] Multicast: Avoid useless duplication of multic ..., Neil Horman, (Wed Apr 15, 12:43 pm)

Re: [PATCH] Multicast: Avoid useless duplication of multic ..., Vlad Yasevich, (Wed Apr 15, 2:06 pm)

Re: [PATCH] Multicast: Avoid useless duplication of multic ..., David Stevens, (Wed Apr 15, 2:42 pm)

Re: [PATCH] Multicast: Avoid useless duplication of multic ..., David Stevens, (Wed Apr 15, 3:16 pm)

Re: [PATCH] Multicast: Avoid useless duplication of multic ..., David Miller, (Wed Apr 15, 4:45 pm)

Re: [PATCH] Multicast: Avoid useless duplication of multic ..., Vlad Yasevich, (Thu Apr 16, 5:44 am)

Re: [PATCH] Multicast: Avoid useless duplication of multic ...