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mdns: Add asynchronous query API

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Closes https://github.com/espressif/esp-idf/issues/7090


* Original commit: espressif/esp-idf@d81482d699
This commit is contained in:
David Cermak
2021-06-03 16:56:12 +02:00
committed by suren-gabrielyan-espressif
parent 40da0d29be
commit 47c7266103
4 changed files with 145 additions and 2 deletions
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49
examples/protocols/mdns/main/mdns_example_main.c
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@ -138,6 +138,54 @@ static void query_mdns_service(const char * service_name, const char * proto)
mdns_query_results_free(results);
}
static bool check_and_print_result(mdns_search_once_t *search)
{
// Check if any result is available
mdns_result_t * result = NULL;
if (!mdns_query_async_get_results(search, 0, &result)) {
return false;
}
if (!result) { // search timeout, but no result
return true;
}
// If yes, print the result
mdns_ip_addr_t * a = result->addr;
while (a) {
if(a->addr.type == ESP_IPADDR_TYPE_V6){
printf(" AAAA: " IPV6STR "\n", IPV62STR(a->addr.u_addr.ip6));
} else {
printf(" A : " IPSTR "\n", IP2STR(&(a->addr.u_addr.ip4)));
}
a = a->next;
}
// and free the result
mdns_query_results_free(result);
return true;
}
static void query_mdns_hosts_async(const char * host_name)
{
ESP_LOGI(TAG, "Query both A and AAA: %s.local", host_name);
mdns_search_once_t *s_a = mdns_query_async_new(host_name, NULL, NULL, MDNS_TYPE_A, 1000, 1);
mdns_query_async_delete(s_a);
mdns_search_once_t *s_aaaa = mdns_query_async_new(host_name, NULL, NULL, MDNS_TYPE_AAAA, 1000, 1);
while (s_a || s_aaaa) {
if (s_a && check_and_print_result(s_a)) {
ESP_LOGI(TAG, "Query A %s.local finished", host_name);
mdns_query_async_delete(s_a);
s_a = NULL;
}
if (s_aaaa && check_and_print_result(s_aaaa)) {
ESP_LOGI(TAG, "Query AAAA %s.local finished", host_name);
mdns_query_async_delete(s_aaaa);
s_aaaa = NULL;
}
}
}
static void query_mdns_host(const char * host_name)
{
ESP_LOGI(TAG, "Query A: %s.local", host_name);
@ -174,6 +222,7 @@ static void check_button(void)
static bool old_level = true;
bool new_level = gpio_get_level(EXAMPLE_BUTTON_GPIO);
if (!new_level && old_level) {
query_mdns_hosts_async("esp32-mdns");
query_mdns_host("esp32");
query_mdns_service("_arduino", "_tcp");
query_mdns_service("_http", "_tcp");