Hi Sylvain,
Thanks for your "useful" input.
If you read what I posted, you will see that I didn't write the code
snippet included. It was a quick-and-dirty copy from some demo code in
a link that Noam posted. As I said elsewhere, my code does check that
each function completes successfully before continuing. And, yes, I did
spot that it uneccessarily (but harmless) includes the terminating
"null" on the end of the string.
If, by "low level netif driver" you mean the ethernet adaptor interface
driver - that was provided by ST, and is the latest version they offer -
I'm not aware of any reported problems with it. Everything on top of
that is LWIP.
Regards,
Mike.
On 28/07/2016 11:16, Sylvain Rochet wrote:
Hi Mike,
On Thu, Jul 28, 2016 at 10:52:50AM +0100, Mike Fleetwood wrote:
I tried one of Noam's linked examples (included below) - but that showed
exactly the same problem, stopped sending after about 20 minutes (I couldn't
tell if it was ERR_USE again, but no reason to think it was any different!).
Well, given how much the snippet below is defective, I assume your whole
software quality is between poor to critically wrong. Given that, the
bug is probably in your low level netif driver.
void udp_test2(void *arg)
{
struct netconn *conn;
char msg[]="testing" ;
struct netbuf *buf;
char * data;
conn = netconn_new( NETCONN_UDP );
Woah, you REALLY HAVE TO check if netconn_new returns a non NULL conn.
netconn_bind(conn, IP_ADDR_ANY, 1234 ); //local port
You also have to check if netconn_bind actually worked…
netconn_connect(conn, IP_ADDR_BROADCAST, 1235 );
You also have to check if netconn_connect actually worked…
for( ;; )
{
buf = netbuf_new();
Woah, you REALLY HAVE TO check if netbuf_new returns a non NULL buf.
data =netbuf_alloc(buf, sizeof(msg));
Woah, you REALLY HAVE TO check if netbuf_alloc returns a non NULL data.
memcpy (data, msg, sizeof (msg));
You probably wanted to use sizeof(msg)-1 and not sizeof(msg) here, given
you wanted to send a static string.
netconn_send(conn, buf);
netbuf_delete(buf); // De-allocate packet buffer
osDelay(4); //some delay!
}
}
Dear god.
Sylvain
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