From mboxrd@z Thu Jan  1 00:00:00 1970
From: Kurt Van Dijck <kurt.van.dijck@eia.be>
Subject: Re: MSG_DONTROUTE
Date: Mon, 16 Jan 2012 14:31:40 +0100
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 <4F0F2195.7050109@hartkopp.net>
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 <loom.20120113T122554-557@post.gmane.org>
 <loom.20120116T103812-141@post.gmane.org>
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To: Wolfgang <wutz@unterderbruecke.de>
Cc: linux-can@vger.kernel.org

On Mon, Jan 16, 2012 at 10:04:17AM +0000, Wolfgang wrote:
> What did I do wrong I want that after the reception of the message it is checked 
> whether the MSG_DONTROUTE flag is set and if it isn't set the message is bridged
> on socket s2? 
> At the moment it doesn't matter if the frame is new or created on the local host.
> 
> 	while (1) {
> 		
> 		iov.iov_len = s.pkt_len;
> 		msg.msg_namelen = sizeof(src);
> 		msg.msg_controllen = sizeof(ctrlmsg);
> 		msg.msg_flags = 0;
> 
> 			
> 		ret = recvmsg(sock, &msg, 0);
> 
> 
> 		if ((msg.msg_flags & MSG_DONTROUTE) == 0)
> 			{
> 				src.can_addr.j1939.addr = J1939_NO_ADDR;
> 				src.can_ifindex = if_nametoindex("can1");
> 				sendmsg(s2, &msg, 0);
> 			}
> 

I think this should have worked.
After a look, I see that this path in kernel is left incomplete ...
For some reason, the line copying the flags dissappeared.

I'm just pushed an update that fixes this.
You did nothing wrong.

Kurt