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[mdns] Move constant strings to flash on ESP8266

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This commit is contained in:
J. Nick Koston
2025-09-04 22:57:44 -05:00
parent b8ed7ec145
commit 639b924be3
1 changed files with 66 additions and 22 deletions
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88
esphome/components/mdns/mdns_component.cpp
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@@ -5,6 +5,24 @@
#include "esphome/core/version.h"
#include "mdns_component.h"
#ifdef USE_ESP8266
#include <pgmspace.h>
// Macro to define strings in PROGMEM on ESP8266, regular memory on other platforms
#define MDNS_STATIC_CONST_CHAR(name, value) static const char name[] PROGMEM = value
// Helper to get string from PROGMEM - returns a temporary std::string
static std::string mdns_string_p(const char *src) {
char buf[64];
strncpy_P(buf, src, sizeof(buf) - 1);
buf[sizeof(buf) - 1] = '\0';
return std::string(buf);
}
#define MDNS_STR(name) mdns_string_p(name)
#else
// On non-ESP8266 platforms, use regular const char*
#define MDNS_STATIC_CONST_CHAR(name, value) static constexpr const char *name = value
#define MDNS_STR(name) name
#endif
#ifdef USE_API
#include "esphome/components/api/api_server.h"
#endif
@@ -21,6 +39,32 @@ static const char *const TAG = "mdns";
#define USE_WEBSERVER_PORT 80 // NOLINT
#endif
// Define all constant strings using the macro
MDNS_STATIC_CONST_CHAR(SERVICE_ESPHOMELIB, "_esphomelib");
MDNS_STATIC_CONST_CHAR(SERVICE_TCP, "_tcp");
MDNS_STATIC_CONST_CHAR(SERVICE_PROMETHEUS, "_prometheus-http");
MDNS_STATIC_CONST_CHAR(SERVICE_HTTP, "_http");
MDNS_STATIC_CONST_CHAR(TXT_FRIENDLY_NAME, "friendly_name");
MDNS_STATIC_CONST_CHAR(TXT_VERSION, "version");
MDNS_STATIC_CONST_CHAR(TXT_MAC, "mac");
MDNS_STATIC_CONST_CHAR(TXT_PLATFORM, "platform");
MDNS_STATIC_CONST_CHAR(TXT_BOARD, "board");
MDNS_STATIC_CONST_CHAR(TXT_NETWORK, "network");
MDNS_STATIC_CONST_CHAR(TXT_API_ENCRYPTION, "api_encryption");
MDNS_STATIC_CONST_CHAR(TXT_API_ENCRYPTION_SUPPORTED, "api_encryption_supported");
MDNS_STATIC_CONST_CHAR(TXT_PROJECT_NAME, "project_name");
MDNS_STATIC_CONST_CHAR(TXT_PROJECT_VERSION, "project_version");
MDNS_STATIC_CONST_CHAR(TXT_PACKAGE_IMPORT_URL, "package_import_url");
MDNS_STATIC_CONST_CHAR(PLATFORM_ESP8266, "ESP8266");
MDNS_STATIC_CONST_CHAR(PLATFORM_ESP32, "ESP32");
MDNS_STATIC_CONST_CHAR(PLATFORM_RP2040, "RP2040");
MDNS_STATIC_CONST_CHAR(NETWORK_WIFI, "wifi");
MDNS_STATIC_CONST_CHAR(NETWORK_ETHERNET, "ethernet");
MDNS_STATIC_CONST_CHAR(NETWORK_THREAD, "thread");
void MDNSComponent::compile_records_() {
this->hostname_ = App.get_name();
@@ -50,8 +94,8 @@ void MDNSComponent::compile_records_() {
if (api::global_api_server != nullptr) {
this->services_.emplace_back();
auto &service = this->services_.back();
service.service_type = "_esphomelib";
service.proto = "_tcp";
service.service_type = MDNS_STR(SERVICE_ESPHOMELIB);
service.proto = MDNS_STR(SERVICE_TCP);
service.port = api::global_api_server->get_port();
const std::string &friendly_name = App.get_friendly_name();
@@ -82,47 +126,47 @@ void MDNSComponent::compile_records_() {
txt_records.reserve(txt_count);
if (!friendly_name_empty) {
txt_records.emplace_back(MDNSTXTRecord{"friendly_name", friendly_name});
txt_records.push_back({MDNS_STR(TXT_FRIENDLY_NAME), friendly_name});
}
txt_records.emplace_back(MDNSTXTRecord{"version", ESPHOME_VERSION});
txt_records.emplace_back(MDNSTXTRecord{"mac", get_mac_address()});
txt_records.push_back({MDNS_STR(TXT_VERSION), ESPHOME_VERSION});
txt_records.push_back({MDNS_STR(TXT_MAC), get_mac_address()});
#ifdef USE_ESP8266
txt_records.emplace_back(MDNSTXTRecord{"platform", "ESP8266"});
txt_records.push_back({MDNS_STR(TXT_PLATFORM), MDNS_STR(PLATFORM_ESP8266)});
#elif defined(USE_ESP32)
txt_records.emplace_back(MDNSTXTRecord{"platform", "ESP32"});
txt_records.push_back({MDNS_STR(TXT_PLATFORM), MDNS_STR(PLATFORM_ESP32)});
#elif defined(USE_RP2040)
txt_records.emplace_back(MDNSTXTRecord{"platform", "RP2040"});
txt_records.push_back({MDNS_STR(TXT_PLATFORM), MDNS_STR(PLATFORM_RP2040)});
#elif defined(USE_LIBRETINY)
txt_records.emplace_back(MDNSTXTRecord{"platform", lt_cpu_get_model_name()});
#endif
txt_records.emplace_back(MDNSTXTRecord{"board", ESPHOME_BOARD});
txt_records.push_back({MDNS_STR(TXT_BOARD), ESPHOME_BOARD});
#if defined(USE_WIFI)
txt_records.emplace_back(MDNSTXTRecord{"network", "wifi"});
txt_records.push_back({MDNS_STR(TXT_NETWORK), MDNS_STR(NETWORK_WIFI)});
#elif defined(USE_ETHERNET)
txt_records.emplace_back(MDNSTXTRecord{"network", "ethernet"});
txt_records.push_back({MDNS_STR(TXT_NETWORK), MDNS_STR(NETWORK_ETHERNET)});
#elif defined(USE_OPENTHREAD)
txt_records.emplace_back(MDNSTXTRecord{"network", "thread"});
txt_records.push_back({MDNS_STR(TXT_NETWORK), MDNS_STR(NETWORK_THREAD)});
#endif
#ifdef USE_API_NOISE
static constexpr const char *NOISE_ENCRYPTION = "Noise_NNpsk0_25519_ChaChaPoly_SHA256";
MDNS_STATIC_CONST_CHAR(NOISE_ENCRYPTION, "Noise_NNpsk0_25519_ChaChaPoly_SHA256");
if (api::global_api_server->get_noise_ctx()->has_psk()) {
txt_records.emplace_back(MDNSTXTRecord{"api_encryption", NOISE_ENCRYPTION});
txt_records.push_back({MDNS_STR(TXT_API_ENCRYPTION), MDNS_STR(NOISE_ENCRYPTION)});
} else {
txt_records.emplace_back(MDNSTXTRecord{"api_encryption_supported", NOISE_ENCRYPTION});
txt_records.push_back({MDNS_STR(TXT_API_ENCRYPTION_SUPPORTED), MDNS_STR(NOISE_ENCRYPTION)});
}
#endif
#ifdef ESPHOME_PROJECT_NAME
txt_records.emplace_back(MDNSTXTRecord{"project_name", ESPHOME_PROJECT_NAME});
txt_records.emplace_back(MDNSTXTRecord{"project_version", ESPHOME_PROJECT_VERSION});
txt_records.push_back({MDNS_STR(TXT_PROJECT_NAME), ESPHOME_PROJECT_NAME});
txt_records.push_back({MDNS_STR(TXT_PROJECT_VERSION), ESPHOME_PROJECT_VERSION});
#endif // ESPHOME_PROJECT_NAME
#ifdef USE_DASHBOARD_IMPORT
txt_records.emplace_back(MDNSTXTRecord{"package_import_url", dashboard_import::get_package_import_url()});
txt_records.push_back({MDNS_STR(TXT_PACKAGE_IMPORT_URL), dashboard_import::get_package_import_url()});
#endif
}
#endif // USE_API
@@ -130,16 +174,16 @@ void MDNSComponent::compile_records_() {
#ifdef USE_PROMETHEUS
this->services_.emplace_back();
auto &prom_service = this->services_.back();
prom_service.service_type = "_prometheus-http";
prom_service.proto = "_tcp";
prom_service.service_type = MDNS_STR(SERVICE_PROMETHEUS);
prom_service.proto = MDNS_STR(SERVICE_TCP);
prom_service.port = USE_WEBSERVER_PORT;
#endif
#ifdef USE_WEBSERVER
this->services_.emplace_back();
auto &web_service = this->services_.back();
web_service.service_type = "_http";
web_service.proto = "_tcp";
web_service.service_type = MDNS_STR(SERVICE_HTTP);
web_service.proto = MDNS_STR(SERVICE_TCP);
web_service.port = USE_WEBSERVER_PORT;
#endif