Hi,
I check args they are correct.
If I put breaks points at each "return ERR_VAL"
the program break there:
static void
do_dns_found(const char *name, struct ip_addr *ipaddr, void *arg)
{
struct dns_api_msg *msg = (struct dns_api_msg*)arg;
LWIP_ASSERT("DNS response for wrong host name", strcmp(msg->name, name)
== 0);
if (ipaddr == NULL) {
/* timeout or memory error */
*msg->err = ERR_VAL;
//<<<<<<<<< HERE
} else {
/* address was resolved */
*msg->err = ERR_OK;
*msg->addr = *ipaddr;
}
/* wake up the application task waiting in netconn_gethostbyname */
sys_sem_signal(msg->sem);
}
In the trace we can see "dns_check_entry: "www.google.com": timeout"
--
herve.
Le Mon, 17 Oct 2011 10:22:28 +0200, Simon Goldschmidt <[email protected]> a
écrit:
Having a quick look at dns.c (from v1.3.2), ERR_VAL is return if you
pass invalid arguments to dns_gethostbyname:
if ((dns_pcb == NULL) || (addr == NULL) ||
(!hostname) || (!hostname[0]) ||
(strlen(hostname) >= DNS_MAX_NAME_LENGTH)) {
return ERR_VAL;
}
This means wither DNS is not initialized, you did not pass an 'addr'
pointer or you did not pass a correct 'hostname' (NULL or empty or too
long).
Simon
"Hervé DANIEL" <[email protected]> wrote:
Hi,
netconn_gethostbyname returns the error.
I found that I call two time dns_init (alwready call with tcpip_init
before)
But it change nothing.
--
herve.
Le Sat, 15 Oct 2011 21:06:23 +0200, Kieran Mansley <[email protected]> a
écrit:
>
> On 14 Oct 2011, at 17:39, Hervé DANIEL wrote:
>
>>
>> Hi,
>>
>> I'm tring to use netconn_gethostbyname (LWIP1.3.2)
>>
>> I've made a basic program with this code
>>
>> dns_init();
>> err=netconn_gethostbyname("www.google.com", &Addr);
>>
>> and i get the adress. (what a beautifull world)
>>
>> then i copy paste to my real program (it s a web server) and i get an
>> error
>> err = -8 : ERR_VAL
>
> What function is it that returns the error?
>
> Kieran
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