Problem with chillispot and dhcp relay

[Lai Zit Seng]

Ok, was too eager to try the svn update so I came back to test anyway. 
Your latest update works great! Thanks. Especially since I imagine my 
DHCP relay configuration is rather unusual :)

May I bug you with one more item. This is not show stopper but 
nevertheless something that bothers me. I can ping across chillispot 
just fine. But if the clients ping chillispot IP itself, they get 
duplicate replies. I.e. 1 echo-request, 2 echo-replies come back. This 
is the case for both wired and wireless clients (so it is not a 
quirkness of the WLC in my environment).

The tcpdump at the client, chillispot's tun interface and chillispot's 
dhcpif interface shows the duplicate echo-replies. The tun interface 
capture does show something odd: There is actually an echo-reply going 
out first, then the echo-request in, then echo-reply out. I can send the

I can send you the tcpdump if needed :)

Regards,

.lzs

ps: Copying back to mailing list.

On 9/8/07 1:30 AM, David Bird wrote:
> Thanks,
> 
>  From a quick review, I think my (and the current svn) version does 
> roughly the same thing. Though, I think mine is a little cleaner in that 
> I moved the call to dhcp_getreq() up above the newconn() in the 
> receive_ip method. And, it returns out of receive_ip -- since the 
> request has actually already been replied to. The newconn() method is 
> also called from within dhcp_getreq() - and I instantiate the connection 
> with the chaddr in the event of a relay. I look forward to hearing how 
> the current snapshot does in your environment.
> 
> David