Re: [lwip-users] netif_set_ipaddr

[Leon Woestenberg]

Hello Jim,

Jim Gibbons wrote:

> I haven't checked the CVS head, but in version 1.1.0, there seems to 
> be a problem in the processing of the listening pcb's.
>
> There is a loop that tries to correct these pcb's if their IP address 
> has changed.  The problem is that there is no check to see if the 
> listening pcb doesn't care about the address.  Normally, this will 
> cause no problems.  It takes some pretty elaborate circumstances 
> (involving DHCP on two or more interfaces and listening before the 
> DHCP address is acquired) for this to be an issue.  Nevertheless, I 
> think it is wrong in principal to change a pcb from listening on any 
> IP address to listening on a specific one.
>
> Have I missed something?

No, you found a bug. I am not sure for the proper fix though. Should UDP 
PCBs listening to the former netif IP address be listening to the new 
netif IP address? And TCP?

Anyone?

Regards,

Leon.