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mdns: fixed crashes on network changes

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1) two events AP_STOP, AP_START shortly after each other may cause IGMP config on already stopped netif
2) not properly locked sending packets to queue from timer task

closes #2580


* Original commit: espressif/esp-idf@097282a8e3
This commit is contained in:
David Cermak
2018-10-22 16:45:42 +02:00
committed by suren-gabrielyan-espressif
parent ea2300753e
commit 9b3b41c3f1
2 changed files with 8 additions and 1 deletions
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6
components/mdns/mdns_networking.c
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@ -62,6 +62,12 @@ static esp_err_t _udp_join_group(tcpip_adapter_if_t tcpip_if, mdns_ip_protocol_t
{
struct netif * netif = NULL;
void * nif = NULL;
if (!tcpip_adapter_is_netif_up(tcpip_if)) {
// Network interface went down before event propagated, skipping IGMP config
return ESP_ERR_INVALID_STATE;
}
esp_err_t err = tcpip_adapter_get_netif(tcpip_if, &nif);
if (err) {
return ESP_ERR_INVALID_ARG;