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mdns: fix empty address change announce packets

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This commit is contained in:
Jiacheng Guo 2021-04-21 16:15:51 +08:00
parent d2a5d25984
commit 7bbb72d865
1 changed files with 23 additions and 1 deletions
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24
components/mdns/mdns.c
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@ -1612,6 +1612,23 @@ static mdns_tx_packet_t * _mdns_create_probe_packet(mdns_if_t tcpip_if, mdns_ip_
return packet;
}
/**
* @brief Create announce packet for self IP addresses
*/
static mdns_tx_packet_t * _mdns_create_announce_self_ip(mdns_if_t tcpip_if, mdns_ip_protocol_t ip_protocol)
{
mdns_tx_packet_t * packet = _mdns_alloc_packet_default(tcpip_if, ip_protocol);
if (!packet) {
return NULL;
}
mdns_host_item_t * host = mdns_get_host_item(_mdns_server->hostname);
if (!_mdns_append_host(&packet->servers, host, true, false)) {
_mdns_free_tx_packet(packet);
return NULL;
}
return packet;
}
/**
* @brief Create announce packet for particular services on particular PCB
*/
@ -1872,7 +1889,12 @@ static void _mdns_announce_pcb(mdns_if_t tcpip_if, mdns_ip_protocol_t ip_protoco
}
_pcb->state = PCB_ANNOUNCE_1;
mdns_tx_packet_t * p = _mdns_create_announce_packet(tcpip_if, ip_protocol, services, len, include_ip);
mdns_tx_packet_t * p = NULL;
if (services != NULL) {
p = _mdns_create_announce_packet(tcpip_if, ip_protocol, services, len, include_ip);
} else {
p = _mdns_create_announce_self_ip(tcpip_if, ip_protocol);
}
if (p) {
_mdns_schedule_tx_packet(p, 0);
}