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Fix Issue that connect() did not work with DNS

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Add additional code to "bool AsyncClient::connect(const char* host, uint16_t port)" and "static void _handle_async_event(lwip_event_packet_t * e)".
Async Service task and queue had not yet been started and "LWIP_TCP_DNS" had no handler defined, so "_tcp_dns_found" called by "dns_gethostbyname" ran into an error.
This commit is contained in:
obrain17
2019-06-29 17:43:43 +02:00
committed by GitHub
parent d1f28ff8fc
commit a924420b93
1 changed files with 10 additions and 0 deletions
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10
src/AsyncTCP.cpp
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@@ -161,6 +161,9 @@ static void _handle_async_event(lwip_event_packet_t * e){
} else if(e->event == LWIP_TCP_ACCEPT){
//ets_printf("A: 0x%08x 0x%08x\n", e->arg, e->accept.client);
AsyncServer::_s_accepted(e->arg, e->accept.client);
} else if(e->event == LWIP_TCP_DNS){
//ets_printf("D: 0x%08x %s = %s\n", e->arg, e->dns.name, ipaddr_ntoa(&e->dns.addr));
AsyncClient::_s_dns_found(e->dns.name, &e->dns.addr, e->arg);
}
free((void*)(e));
}
@@ -674,6 +677,13 @@ bool AsyncClient::connect(IPAddress ip, uint16_t port){
bool AsyncClient::connect(const char* host, uint16_t port){
ip_addr_t addr;
if(!_start_async_task()){
Serial.println("failed to start task");
log_e("failed to start task");
return false;
}
err_t err = dns_gethostbyname(host, &addr, (dns_found_callback)&_tcp_dns_found, this);
if(err == ERR_OK) {
return connect(IPAddress(addr.u_addr.ip4.addr), port);