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Re: [lwip-users] Problem about the loopback
From: |
Kieran Mansley |
Subject: |
Re: [lwip-users] Problem about the loopback |
Date: |
Tue, 06 Sep 2011 10:02:55 +0100 |
On Tue, 2011-09-06 at 10:47 +0800, Aimar wrote:
> Dear Kieran,
> Thanks for your reply. Actually I think this compare should
> be used to confirm if the destination port in the UDP head of the
> incoming packet which is from the remote host is equal to the local
> port. In normal situation the remote host will pepare this, but when
> sending a packet to the address 127.0.0.1 and the netif receive this
> packet, it should swap the destination port and the source port in the
> UDP head, shouldn't it?
Why? We wouldn't swap them if they were going out over the physical
network, and the loopback route is no different in this respect.
Kieran