Support for LibreTiny platform (RTL8710, BK7231 & other modules) (#3509)

Co-authored-by: Kuba Szczodrzyński <kuba@szczodrzynski.pl>
Co-authored-by: Sam Neirinck <git@samneirinck.com>
Co-authored-by: David Buezas <dbuezas@users.noreply.github.com>
Co-authored-by: Stroe Andrei Catalin <catalin2402@gmail.com>
Co-authored-by: Sam Neirinck <github@samneirinck.be>
Co-authored-by: Péter Sárközi <xmisterhu@gmail.com>
Co-authored-by: Hajo Noerenberg <hn@users.noreply.github.com>

esphome/components/mdns/mdns_libretiny.cpp

@@ -0,0 +1,43 @@
+#ifdef USE_LIBRETINY
+
+#include "esphome/components/network/ip_address.h"
+#include "esphome/components/network/util.h"
+#include "esphome/core/log.h"
+#include "mdns_component.h"
+
+#include <mDNS.h>
+
+namespace esphome {
+namespace mdns {
+
+void MDNSComponent::setup() {
+  this->compile_records_();
+
+  MDNS.begin(this->hostname_.c_str());
+
+  for (const auto &service : this->services_) {
+    // Strip the leading underscore from the proto and service_type. While it is
+    // part of the wire protocol to have an underscore, and for example ESP-IDF
+    // expects the underscore to be there, the ESP8266 implementation always adds
+    // the underscore itself.
+    auto *proto = service.proto.c_str();
+    while (*proto == '_') {
+      proto++;
+    }
+    auto *service_type = service.service_type.c_str();
+    while (*service_type == '_') {
+      service_type++;
+    }
+    MDNS.addService(service_type, proto, service.port);
+    for (const auto &record : service.txt_records) {
+      MDNS.addServiceTxt(service_type, proto, record.key.c_str(), record.value.c_str());
+    }
+  }
+}
+
+void MDNSComponent::on_shutdown() {}
+
+}  // namespace mdns
+}  // namespace esphome
+
+#endif