From: Oliver Hartkopp <socketcan@hartkopp.net>
Date: Tue, 19 Oct 2010 09:32:04 +0000 (+0000)
Subject: can-raw: add msg_flags to distinguish local traffic
X-Git-Tag: v2.6.37-rc1~147^2~9
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=1e55659ce6ddb5247cee0b1f720d77a799902b85;p=pandora-kernel.git

can-raw: add msg_flags to distinguish local traffic

CAN has no addressing scheme. It is currently impossible for userspace
to tell is a received CAN frame comes from another process on the local
host, or from a remote CAN device.

This patch add support for userspace applications to distinguish between
'own', 'local' and 'remote' CAN traffic. The distinction is made by returning
flags in msg->msg_flags in the call to recvmsg().

The added documentation explains the introduced flags.

Signed-off-by: Kurt Van Dijck <kurt.van.dijck@eia.be>
Signed-off-by: Oliver Hartkopp <socketcan@hartkopp.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
---

Reading git-diff-tree failed