lists.openwall.net   lists  /  announce  owl-users  owl-dev  john-users  john-dev  passwdqc-users  yescrypt  popa3d-users  /  oss-security  kernel-hardening  musl  sabotage  tlsify  passwords  /  crypt-dev  xvendor  /  Bugtraq  Full-Disclosure  linux-kernel  linux-netdev  linux-ext4  linux-hardening  linux-cve-announce  PHC 
Open Source and information security mailing list archives
 
Hash Suite: Windows password security audit tool. GUI, reports in PDF.
[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]
Message-ID: <OF0CB99079.B56E714F-ON88257599.0079319C-88257599.007A5C56@us.ibm.com>
Date:	Wed, 15 Apr 2009 15:16:33 -0700
From:	David Stevens <dlstevens@...ibm.com>
To:	Christoph Lameter <cl@...ux.com>
Cc:	David Miller <davem@...emloft.net>, netdev@...r.kernel.org,
	netdev-owner@...r.kernel.org, Neil Horman <nhorman@...driver.com>
Subject: Re: [PATCH] Multicast: Avoid useless duplication of multicast messages

Actually, I think having an option for Solaris
compatibility might be a good idea, but I think
it should be per-socket.

I know of at least one application (a JVM) in
the wild that relies on the current behavior--
joins are done in one process for sockets in
another. It isn't necessarily obvious what
will break if you turn it off globally.

I tend to agree with Neil that it really shouldn't
be necessary, but there is no doubt it causes
great confusion to people.

Also, for the record, Linux doesn't support SSM
per RFC 4607. The filtering it requires applies
only to its address range and it explicitly states
the current Linux model as part of the reasoning
for it in the SSM address range only. That indicates
to me it is incorrect to filter all multicasts that
way, as Solaris does.

Doing something per-socket to express what you want
easily is fine with me and, as long as it defaults to
standard behavior, not a standards issue. Changing
all sockets on the machine from existing, correct
behavior I think is not appropriate.

                                                +-DLS

--
To unsubscribe from this list: send the line "unsubscribe netdev" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html

Powered by blists - more mailing lists

Powered by Openwall GNU/*/Linux Powered by OpenVZ