Re: [lwip-users] DHCP Client (urgent)

[Fabian Koch]

> Hello,
> Good day.
> 
> I'm using lwip-1.3.1 with FreeRTOS.
> I want to establish a DHCP client. But I don’t know how to set DCHP
and how
> to call the correct functions.
> Any idea on this one?

you can use netif_set_status_callback()
to establish a function that will be called when the interface goes up
(i.e. indicated that DHCP has finished). And then just call netifapi_dhcp_start().

I then use a task that waits for a semaphore that
gets triggered in the interface-up function if dhcp was completed and times
out otherwise, so I can fall-back to a fixed IP when DHCP is not reachable
(AUTOIP is not feasable in my enivornment).

regards,
Fabian