Sergio, Thanks for your reply. I was out of the country until today,
sorry for the late reply
The problem is similar to the following pseudo codes:
while (1)
{
p=pbuf_alloc()
memcopy (p->payload,...)
err= udp_sendto (...)
pbuf_free(p)
/*if I delay a little here, err will be 0, otherwise, it will
generate -1 eventually*/
}
Maybe I should track down the return from pbuf_alloc to confirm that I
indeed have a valid buffer
Message: 1
Date: Mon, 15 May 2017 09:54:53 -0300
From: "Sergio R. Caprile" <scapr...@gmail.com>
To: lwip-users@nongnu.org
Subject: Re: [lwip-users] How to find out if I can send out more UDP
packets?
Message-ID: <f9ed410a-78fd-68fb-2849-a31051940...@gmail.com>
Content-Type: text/plain; charset=utf-8; format=flowed
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 ?
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