CMUX: Implement cmux test

Cleanup example code, fix write err length

esp_modem/test/host_test/main/test_modem.cpp

@@ -22,7 +22,7 @@ public:
     }
 
     int write(uint8_t *data, size_t len) override {
-        if (len > 2 && (data[len-1] == '\r' || data[len-1] == '+') ) {
+        if (len > 2 && (data[len-1] == '\r' || data[len-1] == '+') ) { // Simple AT responder
             std::string command((char*)data, len);
             std::string response;
             if (command == "ATE1\r" || command == "ATE0\r" || command == "+++") {
@@ -38,14 +38,17 @@ public:
                 data_len = response.length();
                 loopback_data.resize(data_len);
                 memcpy(&loopback_data[0], &response[0], data_len);
-                auto ret = std::async(on_data, data_len);
+                auto ret = std::async(on_data, nullptr, data_len);
                 return len;
             }
         }
+        if (len > 2 && data[0] == 0xf9 && data[2] == 0xef) { // Simple CMUX responder
+            data[2] = 0xff; // turn the request into a reply -> implements CMUX loopback
+        }
         loopback_data.resize(data_len + len);
         memcpy(&loopback_data[data_len], data, len);
         data_len += len;
-        auto ret = std::async(on_data, data_len);
+        auto ret = std::async(on_data, nullptr, data_len);
         return len;
     }
 
@@ -59,9 +62,6 @@ public:
         return read_len;
     }
 
-    void set_data_cb(std::function<bool(size_t len)> f) override {
-        on_data = std::move(f);
-    }
 
 private:
     enum class status_t {
@@ -143,3 +143,23 @@ TEST_CASE("DCE modes", "[esp_modem]")
     CHECK(dce->set_mode(esp_modem::modem_mode::DATA_MODE) == true);
     CHECK(dce->set_mode(esp_modem::modem_mode::COMMAND_MODE) == true);
 }
+
+TEST_CASE("DCE CMUX test", "[esp_modem]") {
+    auto term = std::make_unique<LoopbackTerm>();
+    auto dte = std::make_shared<DTE>(std::move(term));
+    CHECK(term == nullptr);
+
+    esp_modem_dce_config_t dce_config = ESP_MODEM_DCE_DEFAULT_CONFIG("APN");
+    esp_netif_t netif{};
+    auto dce = create_SIM7600_dce(&dce_config, dte, &netif);
+    CHECK(dce != nullptr);
+
+    CHECK(dce->set_mode(esp_modem::modem_mode::CMUX_MODE) == true);
+    const auto test_command = "Test\n";
+    auto ret = dce->command(test_command, [&](uint8_t *data, size_t len) {
+        std::string response((char *) data, len);
+        CHECK(response == test_command);
+        return command_result::OK;
+    }, 1000);
+    CHECK(ret == command_result::OK);
+}

esp_modem/test/host_test/sdkconfig

@@ -1,82 +0,0 @@
-#
-# Automatically generated file. DO NOT EDIT.
-# Espressif IoT Development Framework (ESP-IDF) Project Configuration
-#
-CONFIG_IDF_CMAKE=y
-CONFIG_IDF_TARGET="linux"
-CONFIG_IDF_FIRMWARE_CHIP_ID=0xFFFF
-
-#
-# SDK tool configuration
-#
-CONFIG_SDK_TOOLPREFIX=""
-# CONFIG_SDK_TOOLCHAIN_SUPPORTS_TIME_WIDE_64_BITS is not set
-# end of SDK tool configuration
-
-#
-# Build type
-#
-CONFIG_APP_BUILD_TYPE_APP_2NDBOOT=y
-# CONFIG_APP_BUILD_TYPE_ELF_RAM is not set
-CONFIG_APP_BUILD_GENERATE_BINARIES=y
-CONFIG_APP_BUILD_BOOTLOADER=y
-CONFIG_APP_BUILD_USE_FLASH_SECTIONS=y
-# end of Build type
-
-#
-# Compiler options
-#
-CONFIG_COMPILER_OPTIMIZATION_DEFAULT=y
-# CONFIG_COMPILER_OPTIMIZATION_SIZE is not set
-# CONFIG_COMPILER_OPTIMIZATION_PERF is not set
-# CONFIG_COMPILER_OPTIMIZATION_NONE is not set
-CONFIG_COMPILER_OPTIMIZATION_ASSERTIONS_ENABLE=y
-# CONFIG_COMPILER_OPTIMIZATION_ASSERTIONS_SILENT is not set
-# CONFIG_COMPILER_OPTIMIZATION_ASSERTIONS_DISABLE is not set
-CONFIG_COMPILER_HIDE_PATHS_MACROS=y
-CONFIG_COMPILER_CXX_EXCEPTIONS=y
-CONFIG_COMPILER_CXX_EXCEPTIONS_EMG_POOL_SIZE=0
-CONFIG_COMPILER_CXX_RTTI=y
-CONFIG_COMPILER_STACK_CHECK_MODE_NONE=y
-# CONFIG_COMPILER_STACK_CHECK_MODE_NORM is not set
-# CONFIG_COMPILER_STACK_CHECK_MODE_STRONG is not set
-# CONFIG_COMPILER_STACK_CHECK_MODE_ALL is not set
-# CONFIG_COMPILER_WARN_WRITE_STRINGS is not set
-# CONFIG_COMPILER_DISABLE_GCC8_WARNINGS is not set
-# CONFIG_COMPILER_DUMP_RTL_FILES is not set
-# end of Compiler options
-
-#
-# Component config
-#
-
-#
-# ESP-MODEM
-#
-CONFIG_MODEM_LEGACY_API=y
-CONFIG_MODEM_PPP_APN="internet"
-# end of ESP-MODEM
-# end of Component config
-
-#
-# Compatibility options
-#
-# CONFIG_LEGACY_INCLUDE_COMMON_HEADERS is not set
-# end of Compatibility options
-
-# Deprecated options for backward compatibility
-CONFIG_TOOLPREFIX=""
-CONFIG_COMPILER_OPTIMIZATION_LEVEL_DEBUG=y
-# CONFIG_COMPILER_OPTIMIZATION_LEVEL_RELEASE is not set
-CONFIG_OPTIMIZATION_ASSERTIONS_ENABLED=y
-# CONFIG_OPTIMIZATION_ASSERTIONS_SILENT is not set
-# CONFIG_OPTIMIZATION_ASSERTIONS_DISABLED is not set
-CONFIG_CXX_EXCEPTIONS=y
-CONFIG_CXX_EXCEPTIONS_EMG_POOL_SIZE=0
-CONFIG_STACK_CHECK_NONE=y
-# CONFIG_STACK_CHECK_NORM is not set
-# CONFIG_STACK_CHECK_STRONG is not set
-# CONFIG_STACK_CHECK_ALL is not set
-# CONFIG_WARN_WRITE_STRINGS is not set
-# CONFIG_DISABLE_GCC8_WARNINGS is not set
-# End of deprecated options