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Code Issues Releases Wiki Activity

[mdns] Eliminate redundant hostname copy to save heap memory

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This commit is contained in:
J. Nick Koston
2025-11-05 11:19:06 -06:00
parent b7838671ae
commit ed0d9e60b8
6 changed files with 11 additions and 9 deletions
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4
esphome/components/mdns/mdns_component.cpp
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@@ -37,8 +37,6 @@ MDNS_STATIC_CONST_CHAR(SERVICE_TCP, "_tcp");
MDNS_STATIC_CONST_CHAR(VALUE_VERSION, ESPHOME_VERSION);
void MDNSComponent::compile_records_(StaticVector<MDNSService, MDNS_SERVICE_COUNT> &services) {
this->hostname_ = App.get_name();
// IMPORTANT: The #ifdef blocks below must match COMPONENTS_WITH_MDNS_SERVICES
// in mdns/__init__.py. If you add a new service here, update both locations.
@@ -179,7 +177,7 @@ void MDNSComponent::dump_config() {
ESP_LOGCONFIG(TAG,
"mDNS:\n"
" Hostname: %s",
this->hostname_.c_str());
App.get_name().c_str());
#ifdef USE_MDNS_STORE_SERVICES
ESP_LOGV(TAG, " Services:");
for (const auto &service : this->services_) {

1
esphome/components/mdns/mdns_component.h
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@@ -76,7 +76,6 @@ class MDNSComponent : public Component {
#ifdef USE_MDNS_STORE_SERVICES
StaticVector<MDNSService, MDNS_SERVICE_COUNT> services_{};
#endif
std::string hostname_;
void compile_records_(StaticVector<MDNSService, MDNS_SERVICE_COUNT> &services);
};

6
esphome/components/mdns/mdns_esp32.cpp
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@@ -2,6 +2,7 @@
#if defined(USE_ESP32) && defined(USE_MDNS)
#include <mdns.h>
#include "esphome/core/application.h"
#include "esphome/core/hal.h"
#include "esphome/core/log.h"
#include "mdns_component.h"
@@ -27,8 +28,9 @@ void MDNSComponent::setup() {
return;
}
mdns_hostname_set(this->hostname_.c_str());
mdns_instance_name_set(this->hostname_.c_str());
const char *hostname = App.get_name().c_str();
mdns_hostname_set(hostname);
mdns_instance_name_set(hostname);
for (const auto &service : services) {
auto txt_records = std::make_unique<mdns_txt_item_t[]>(service.txt_records.size());

3
esphome/components/mdns/mdns_esp8266.cpp
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@@ -4,6 +4,7 @@
#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"
@@ -20,7 +21,7 @@ void MDNSComponent::setup() {
this->compile_records_(services);
#endif
MDNS.begin(this->hostname_.c_str());
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

3
esphome/components/mdns/mdns_libretiny.cpp
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@@ -3,6 +3,7 @@
#include "esphome/components/network/ip_address.h"
#include "esphome/components/network/util.h"
#include "esphome/core/application.h"
#include "esphome/core/log.h"
#include "mdns_component.h"
@@ -20,7 +21,7 @@ void MDNSComponent::setup() {
this->compile_records_(services);
#endif
MDNS.begin(this->hostname_.c_str());
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

3
esphome/components/mdns/mdns_rp2040.cpp
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@@ -3,6 +3,7 @@
#include "esphome/components/network/ip_address.h"
#include "esphome/components/network/util.h"
#include "esphome/core/application.h"
#include "esphome/core/log.h"
#include "mdns_component.h"
@@ -20,7 +21,7 @@ void MDNSComponent::setup() {
this->compile_records_(services);
#endif
MDNS.begin(this->hostname_.c_str());
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