On 15. Oct 2020, at 23:23, David Laight [off-list ref] wrote:

From: Marcelo Ricardo Leitner

quoted

Sent: 15 October 2020 18:43

Actually..

On Tue, Oct 13, 2020 at 03:27:41PM +0800, Xin Long wrote:
...

quoted

Also add sysctl udp_port to allow changing the listening
sock's port by users.

I've not read through this change...

But surely the UDP port (or ports) that you need to use
will depend on the remote system's configuration.

The local encapsulation port can be system wide, the remote encapsulation port
is per remote address. See https://tools.ietf.org/html/rfc6951#section-5.1

Best regards
Michael

So they need to be a property of the socket, not a
system-wide value.

I can easily imagine my M3UA code connecting to different
network providers which have decided to use different
UDP port numbers.

	David

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