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FIX IPv4-ONLY AsyncUDP::listenMulticast() for receiving IPv6 #11443

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FIX IPv4-ONLY AsyncUDP::listenMulticast() for receiving IPv6 #11443

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15 changes: 14 additions & 1 deletion libraries/AsyncUDP/src/AsyncUDP.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -682,6 +682,8 @@ static esp_err_t joinMulticastGroup(const ip_addr_t *addr, bool join, tcpip_adap
}

bool AsyncUDP::listenMulticast(const ip_addr_t *addr, uint16_t port, uint8_t ttl, tcpip_adapter_if_t tcpip_if) {
ip_addr_t bind_addr;

if (!ip_addr_ismulticast(addr)) {
return false;
}
Expand All @@ -690,7 +692,18 @@ bool AsyncUDP::listenMulticast(const ip_addr_t *addr, uint16_t port, uint8_t ttl
return false;
}

if (!listen(NULL, port)) {
#if CONFIG_LWIP_IPV6
if (IP_IS_V6(addr)) {
IP_SET_TYPE(&bind_addr, IPADDR_TYPE_V6);
ip6_addr_set_any(&bind_addr.u_addr.ip6);
} else {
#endif
IP_SET_TYPE(&bind_addr, IPADDR_TYPE_V4);
ip4_addr_set_any(&bind_addr.u_addr.ip4);
#if CONFIG_LWIP_IPV6
}
#endif
if (!listen(&bind_addr, port)) {
return false;
}

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