mdns_esp8266.cpp

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#include "esphome/core/defines.h"
#if defined(USE_ESP8266) && defined(USE_ARDUINO) && defined(USE_MDNS)
 
#include <ESP8266mDNS.h>
#include "esphome/components/network/ip_address.h"
#include "esphome/components/network/util.h"
#include "esphome/core/application.h"
#include "esphome/core/hal.h"
#include "esphome/core/log.h"
#include "mdns_component.h"
 
namespace esphome::mdns {
 
static void register_esp8266(MDNSComponent *, StaticVector<MDNSService, MDNS_SERVICE_COUNT> &services) {
  MDNS.begin(App.get_name().c_str());
 
  for (const auto &service : 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 = MDNS_STR_ARG(service.proto);
    while (progmem_read_byte((const uint8_t *) proto) == '_') {
      proto++;
    }
    auto *service_type = MDNS_STR_ARG(service.service_type);
    while (progmem_read_byte((const uint8_t *) service_type) == '_') {
      service_type++;
    }
    uint16_t port = const_cast<TemplatableValue<uint16_t> &>(service.port).value();
    MDNS.addService(FPSTR(service_type), FPSTR(proto), port);
    for (const auto &record : service.txt_records) {
      MDNS.addServiceTxt(FPSTR(service_type), FPSTR(proto), FPSTR(MDNS_STR_ARG(record.key)),
                         FPSTR(MDNS_STR_ARG(record.value)));
    }
  }
}
 
void MDNSComponent::setup() {
  this->setup_buffers_and_register_(register_esp8266);
  // Schedule MDNS.update() via set_interval() instead of overriding loop().
  // This removes the component from the per-iteration loop list entirely,
  // eliminating virtual dispatch overhead on every main loop cycle.
  // See MDNS_UPDATE_INTERVAL_MS comment in mdns_component.h for safety analysis.
  this->set_interval(MDNS_UPDATE_INTERVAL_MS, []() { MDNS.update(); });
}
 
void MDNSComponent::on_shutdown() {
  MDNS.close();
  delay(10);
}
 
}  // namespace esphome::mdns
 
#endif