Re: [lwip-users] How to find out if I can send out more UDP packets?

[Sergio R. Caprile]

sendto adds a header to the pbuf you allocated and calls the send 
function on your driver, so, basically, if you don't have an RTOS or 
some esoteric magic around, I don't see how can you be running out of 
memory unless your driver or other application is also using it and you 
don't free it.
Could you describe your scenario so we can make an educated guess ?