Re: [lwip-users] LwIP Support - sethostaddr

[Kyle Sweet]

Hi Marcos,

Thanks for the prompt feedback!

I'm unclear about what it means to do this by INTERRUPTION.  Can you please 
explain?

Thanks

Kyle

----- Original Message -----
From: "Marcos Guerra Medina" <address@hidden>
To: "Mailing list for lwIP users" <address@hidden>
Sent: Thursday, September 8, 2011 4:30:35 PM
Subject: Re: [lwip-users] LwIP Support - sethostaddr


I think it is best done by disruptions to close the socket and start with a new 
connection and the new IP you want. 
As to whether it can do When you want, yes, as long as this by INTERRUPTION. 
Greetings. 


2011/9/8 Kyle Sweet < address@hidden > 


Hello, 

I'm seeking support for using Lwip. I'm not sure if this is the best way to ask 
a question - if not, could someone please help me direct my question? 

Here goes: 

I am using LwIP on a Blackfin DSP from Analog Devices. I'm using UDP with 
static IP addressing and no DHCP. But I want to be able to change the IP 
address on the fly. I'm trying to use sethostaddr() to accomplish this. I have 
a few specific questions: 

1) Can I just call sethostaddr() at any time, wihtout having to completely 
re-initialize the TCP/IP stack? 
2) Would I then be running with the new IP Address? 
3) If I have open sockets, would I need to close them first and re-open new 
sockets with the new IP address? 
4) Is there anything else I need to know about changing IP address in an LwIP 
application? 

Hope to hear back from you! 

Cheers, 
Kyle 

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