static void pico_dns_client_retransmission(unsigned long now, void *arg)
{
struct pico_dns_key *key = (struct pico_dns_key *)arg;
struct pico_dns_ns *q_ns = NULL;
if (!key->retrans) {
dns_dbg("DNS: no retransmission!\n");
pico_free(key->q_hdr);
if(pico_tree_delete(&DNSTable,key))
pico_free(key);
}
else if (key->retrans <= PICO_DNS_CLIENT_MAX_RETRANS) {
key->retrans++;
dns_dbg("DNS: retransmission! (%u attempts)\n", key->retrans);
// ugly hack
q_ns = pico_tree_next(pico_tree_findNode(&NSTable,&key->q_ns))->keyValue;
if (q_ns)
key->q_ns = *q_ns;
else
key->q_ns = *((struct pico_dns_ns *)pico_tree_first(&NSTable));
pico_dns_client_send(key);
pico_timer_add(PICO_DNS_CLIENT_RETRANS, pico_dns_client_retransmission, key);
} else {
dns_dbg("DNS ERROR: no reply from nameservers! (%u attempts)\n", key->retrans);
pico_socket_close(key->s);
pico_err = PICO_ERR_EIO;
key->callback(NULL, key->arg);
pico_free(key->q_hdr);
/* RB_REMOVE returns pointer to removed element, NULL to indicate error */
if(pico_tree_delete(&DNSTable,key))
pico_free(key);
}
}
static void pico_dns_client_retransmission(pico_time now, void *arg)
{
struct pico_dns_query *q = NULL;
struct pico_dns_query dummy;
IGNORE_PARAMETER(now);
if(!arg)
return;
/* search for the dns query and free used space */
dummy.id = *(uint16_t *)arg;
q = (struct pico_dns_query *)pico_tree_findKey(&DNSTable, &dummy);
PICO_FREE(arg);
/* dns query successful? */
if (!q) {
return;
}
if (q->retrans++ <= PICO_DNS_CLIENT_MAX_RETRANS) {
q->q_ns = pico_dns_client_next_ns(&q->q_ns.ns);
pico_dns_client_send(q);
} else {
pico_err = PICO_ERR_EIO;
q->callback(NULL, q->arg);
pico_dns_client_del_query(q->id);
}
}
