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mdns: Fix case where service is NULL and that will cause exception

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* Original commit: espressif/esp-idf@4fa130ae4f
This commit is contained in:
me-no-dev
2018-01-22 13:17:59 +01:00
committed by suren-gabrielyan-espressif
parent ef924f1aa5
commit bce7d5231c
1 changed files with 8 additions and 0 deletions
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8
components/mdns/mdns.c
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@ -1304,6 +1304,10 @@ static mdns_tx_packet_t * _mdns_get_next_pcb_packet(tcpip_adapter_if_t tcpip_if,
*/ */
static void _mdns_remove_scheduled_answer(tcpip_adapter_if_t tcpip_if, mdns_ip_protocol_t ip_protocol, uint16_t type, mdns_srv_item_t * service) static void _mdns_remove_scheduled_answer(tcpip_adapter_if_t tcpip_if, mdns_ip_protocol_t ip_protocol, uint16_t type, mdns_srv_item_t * service)
{ {
mdns_srv_item_t s = {NULL, NULL};
if (!service) {
service = &s;
}
mdns_tx_packet_t * q = _mdns_server->tx_queue_head; mdns_tx_packet_t * q = _mdns_server->tx_queue_head;
while (q) { while (q) {
if (q->tcpip_if == tcpip_if && q->ip_protocol == ip_protocol && q->distributed) { if (q->tcpip_if == tcpip_if && q->ip_protocol == ip_protocol && q->distributed) {
@ -1336,6 +1340,10 @@ static void _mdns_dealloc_answer(mdns_out_answer_t ** destnation, uint16_t type,
if (!d) { if (!d) {
return; return;
} }
mdns_srv_item_t s = {NULL, NULL};
if (!service) {
service = &s;
}
if (d->type == type && d->service == service->service) { if (d->type == type && d->service == service->service) {
*destnation = d->next; *destnation = d->next;
free(d); free(d);