Add LibreTiny support

.github/workflows/ci.yml

@@ -78,6 +78,11 @@ jobs:
           - env: ci-arduino-3-latest
             board: esp32-c6-devkitc-1
 
+          - env: ci-arduino-libretiny
+            board: generic-bk7231n-qfn32-tuya
+          - env: ci-arduino-libretiny
+            board: generic-rtl8710bn-2mb-788k
+
     steps:
       - name: Checkout
         uses: actions/checkout@v4

platformio.ini

@@ -43,3 +43,12 @@ board = ${sysenv.PIO_BOARD}
 [env:ci-arduino-3-latest]
 platform = https://github.com/pioarduino/platform-espressif32/releases/download/54.03.20-rc2/platform-espressif32.zip
 board = ${sysenv.PIO_BOARD}
+
+[env:ci-arduino-libretiny]
+platform = libretiny
+board = ${sysenv.PIO_BOARD}
+build_flags =
+  ${env.build_flags}
+  -Wno-unused-parameter
+  -Wno-unused-variable
+  -Wno-missing-field-initializers

src/AsyncTCP.cpp

@@ -3,6 +3,7 @@
 
 #include "AsyncTCP.h"
 
+#ifndef LIBRETINY
 #include <esp_log.h>
 
 #ifdef ARDUINO
@@ -22,6 +23,18 @@ static unsigned long millis() {
   return (unsigned long)(esp_timer_get_time() / 1000ULL);
 }
 #endif
+#endif
+
+#ifdef LIBRETINY
+#include <Arduino.h>
+// LibreTiny does not support IDF - disable code that expects it to be available
+#define ESP_IDF_VERSION_MAJOR (0)
+// xTaskCreatePinnedToCore is not available, force single-core operation
+#define CONFIG_FREERTOS_UNICORE 1
+// ESP watchdog is not available
+#undef CONFIG_ASYNC_TCP_USE_WDT
+#define CONFIG_ASYNC_TCP_USE_WDT 0
+#endif
 
 extern "C" {
 #include "lwip/dns.h"
@@ -837,7 +850,11 @@ bool AsyncClient::connect(ip_addr_t addr, uint16_t port) {
   tcp_pcb *pcb;
   {
     tcp_core_guard tcg;
+#if LWIP_IPV4 && LWIP_IPV6
     pcb = tcp_new_ip_type(addr.type);
+#else
+    pcb = tcp_new_ip_type(IPADDR_TYPE_V4);
+#endif
     if (!pcb) {
       log_e("pcb == NULL");
       return false;
@@ -857,8 +874,13 @@ bool AsyncClient::connect(ip_addr_t addr, uint16_t port) {
 bool AsyncClient::connect(const IPAddress &ip, uint16_t port) {
   ip_addr_t addr;
 #if ESP_IDF_VERSION_MAJOR < 5
+#if LWIP_IPV4 && LWIP_IPV6
+  // if both IPv4 and IPv6 are enabled, ip_addr_t has a union field and the address type
   addr.u_addr.ip4.addr = ip;
   addr.type = IPADDR_TYPE_V4;
+#else
+  addr.addr = ip;
+#endif
 #else
   ip.to_ip_addr_t(&addr);
 #endif
@@ -1343,19 +1365,33 @@ uint16_t AsyncClient::getLocalPort() const {
 }
 
 ip4_addr_t AsyncClient::getRemoteAddress4() const {
+#if LWIP_IPV4 && LWIP_IPV6
   if (_pcb && _pcb->remote_ip.type == IPADDR_TYPE_V4) {
     return _pcb->remote_ip.u_addr.ip4;
-  } else {
+  }
+#else
+  if (_pcb) {
+    return _pcb->remote_ip;
+  }
+#endif
+  else {
     ip4_addr_t nulladdr;
     ip4_addr_set_zero(&nulladdr);
     return nulladdr;
   }
 }
 
 ip4_addr_t AsyncClient::getLocalAddress4() const {
+#if LWIP_IPV4 && LWIP_IPV6
   if (_pcb && _pcb->local_ip.type == IPADDR_TYPE_V4) {
     return _pcb->local_ip.u_addr.ip4;
-  } else {
+  }
+#else
+  if (_pcb) {
+    return _pcb->local_ip;
+  }
+#endif
+  else {
     ip4_addr_t nulladdr;
     ip4_addr_set_zero(&nulladdr);
     return nulladdr;
@@ -1486,24 +1522,34 @@ AsyncServer::AsyncServer(ip_addr_t addr, uint16_t port)
 #ifdef ARDUINO
 AsyncServer::AsyncServer(IPAddress addr, uint16_t port) : _port(port), _noDelay(false), _pcb(0), _connect_cb(0), _connect_cb_arg(0) {
 #if ESP_IDF_VERSION_MAJOR < 5
+#if LWIP_IPV4 && LWIP_IPV6
   _addr.type = IPADDR_TYPE_V4;
   _addr.u_addr.ip4.addr = addr;
+#else
+  _addr.addr = addr;
+#endif
 #else
   addr.to_ip_addr_t(&_addr);
 #endif
 }
-#if ESP_IDF_VERSION_MAJOR < 5
+#if ESP_IDF_VERSION_MAJOR < 5 && __has_include(<IPv6Address.h>) && LWIP_IPV6
 AsyncServer::AsyncServer(IPv6Address addr, uint16_t port) : _port(port), _noDelay(false), _pcb(0), _connect_cb(0), _connect_cb_arg(0) {
+#if LWIP_IPV4 && LWIP_IPV6
   _addr.type = IPADDR_TYPE_V6;
+#endif
   auto ipaddr = static_cast<const uint32_t *>(addr);
   _addr = IPADDR6_INIT(ipaddr[0], ipaddr[1], ipaddr[2], ipaddr[3]);
 }
 #endif
 #endif
 
 AsyncServer::AsyncServer(uint16_t port) : _port(port), _noDelay(false), _pcb(0), _connect_cb(0), _connect_cb_arg(0) {
+#if LWIP_IPV4 && LWIP_IPV6
   _addr.type = IPADDR_TYPE_ANY;
   _addr.u_addr.ip4.addr = INADDR_ANY;
+#else
+  _addr.addr = IPADDR_TYPE_ANY;
+#endif
 }
 
 AsyncServer::~AsyncServer() {
@@ -1527,7 +1573,11 @@ void AsyncServer::begin() {
   int8_t err;
   {
     tcp_core_guard tcg;
+#if LWIP_IPV4 && LWIP_IPV6
     _pcb = tcp_new_ip_type(_addr.type);
+#else
+    _pcb = tcp_new_ip_type(IPADDR_TYPE_V4);
+#endif
   }
   if (!_pcb) {
     log_e("_pcb == NULL");

src/AsyncTCP.h

@@ -7,7 +7,9 @@
 #include "AsyncTCPVersion.h"
 #define ASYNCTCP_FORK_ESP32Async
 
+#ifndef LIBRETINY
 #include <esp_idf_version.h>
+#endif
 
 #ifdef ARDUINO
 #include "IPAddress.h"
@@ -29,9 +31,9 @@ extern "C" {
 #else
 extern "C" {
 #include <lwip/pbuf.h>
+#include <FreeRTOS.h>
 #include <semphr.h>
 }
-#define CONFIG_ASYNC_TCP_RUNNING_CORE -1  // any available core
 #endif
 
 // If core is not defined, then we are running in Arduino or PIO