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Re: bin/49868: tftpd(8) doesn't play well with clients that return acknowledgements to the broadcast address
The following reply was made to PR bin/49868; it has been noted by GNATS.
From: David Holland <dholland-bugs%netbsd.org@localhost>
Subject: Re: bin/49868: tftpd(8) doesn't play well with clients that return
acknowledgements to the broadcast address
Date: Sun, 11 Oct 2015 03:22:29 +0000
On Fri, May 01, 2015 at 12:45:01AM +0000, Robert Elz wrote:
> The one issue I see with this change is that switching from a
> connect/send implementation to sendto (which happens in the patch
> independently of the new switch) means that netstat won't identify
> the clients any more. It would be kind of nice if that didn't
> happen unconditionally -
There's another reason: as I recall if you have a multihomed machine
serving tftp, bad things happen if you don't use UDP connect to
deliver packets. That is: if you don't bind the source address of the
send socket, the packets might come from the wrong address; and if you
try to, you end up having to scan routing tables and other horrors to
figure out which source address to use. Or something like that.
Anyway I would suggest leaving the connect/send alone unless the
broadcast stuff is specifically needd.
David A. Holland
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