Re: [lwip-users] Problem about the loopback

[Kieran Mansley]

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