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mdns: fixed crash on event during deinit

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mdns library deinitialization destroys internal structures including action queue. if an event (e.g. network update) received
after some essential stucture is destoyed, an unexpected behavour might be introduced (e.g. crash of adding the event notification
to the action queue which was already destroyed

Closes WIFI-1485
This commit is contained in:
David Cermak
2019-12-09 11:29:19 +01:00
parent beb73456ee
commit 1f263434a6
1 changed files with 5 additions and 3 deletions
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8
components/mdns/mdns.c
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@ -4249,6 +4249,11 @@ void mdns_free()
if (!_mdns_server) {
return;
}
esp_event_handler_unregister(WIFI_EVENT, ESP_EVENT_ANY_ID, &event_handler);
esp_event_handler_unregister(IP_EVENT, ESP_EVENT_ANY_ID, &event_handler);
esp_event_handler_unregister(ETH_EVENT, ESP_EVENT_ANY_ID, &event_handler);
mdns_service_remove_all(_mdns_server);
_mdns_service_task_stop();
for (i=0; i<TCPIP_ADAPTER_IF_MAX; i++) {
@ -4279,9 +4284,6 @@ void mdns_free()
free(h);
}
vSemaphoreDelete(_mdns_server->lock);
esp_event_handler_unregister(WIFI_EVENT, ESP_EVENT_ANY_ID, &event_handler);
esp_event_handler_unregister(IP_EVENT, ESP_EVENT_ANY_ID, &event_handler);
esp_event_handler_unregister(ETH_EVENT, ESP_EVENT_ANY_ID, &event_handler);
free(_mdns_server);
_mdns_server = NULL;
}