Re: [lwip-users] RAW UDP polling, timeouts, so_options

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ncoage wrote:
> I am writing TFTP server (by modifying Luminary Micro code) and I wonder how to 
> implement timeouts in UDP connections (RAW API). In TCP we have a tcp_poll 
> callbacks. Is there something similar in UDP?
>    
No, but you can use sys_timeout/sys_untimeout instead to create a timer 
(running in the tcpip_thread). Then either your recv callback or the 
timeout function will be called, and you can stop the timer 
(sys_untimeout) when the recv callback function is called first.
> Looking at udp_pcb, there is a field called so_options. Where can I find the 
> list of the options with descriptions?
>    
Have a look at the SOF_* defines (or at least I think that's it). But 
there is no "recv-timeout" implemented with the so_options (I think they 
are mainly there for SO_REUSEADDR).

Simon