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From: Jan Kiszka <jan.kiszka@domain.hid>
To: Daniel Schnell <daniel.schnell@domain.hid>
Cc: xenomai@xenomai.org
Subject: Re: [Xenomai-help] RTCAN: multiple sockets on one device
Date: Thu, 23 Nov 2006 16:44:23 +0100	[thread overview]
Message-ID: <4565C1D7.9060509@domain.hid> (raw)
In-Reply-To: <DD39B5C3F4963040ADC9768BE7E430CB015D51BC@is-hdq-exchange.marel.net>

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Daniel Schnell wrote:
> Hi,
>  
> If one opens two sockets to one CAN port and wants to use one socket
> file descriptor for reading and the other for writing, is it possible to
> limit the writing socket to _write only_, so it doesn't receive messages
> ?

Option 1: Do not bind the socket, use sendto/sendmsg for transmitting
(send requires binding).

Option 2: Register an impossible filter for the write-only socket. This
is suboptimal ATM. Actually we should allow registering an empty filter
list for this purpose. This has been recently discussed on the socketcan
list, but I'm not aware of any concrete result.

Jan


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  reply	other threads:[~2006-11-23 15:44 UTC|newest]

Thread overview: 4+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2006-11-23 12:11 [Xenomai-help] RTCAN: multiple sockets on one device Daniel Schnell
2006-11-23 15:44 ` Jan Kiszka [this message]
2006-11-23 16:29   ` Wolfgang Grandegger
2006-12-03 15:49   ` Wolfgang Grandegger

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