fix(modem): Updated per review comments

components/esp_modem/test/target_ota/components/manual_ota/manual_ota.cpp

@@ -17,7 +17,7 @@ static const char *TAG = "manual_ota";
 bool manual_ota::begin()
 {
     if (status != state::UNDEF) {
-        ESP_LOGE(TAG, "Invalid state");
+        ESP_LOGE(TAG, "Invalid state for manual_ota::perform");
         return false;
     }
     const esp_partition_t *configured = esp_ota_get_boot_partition();
@@ -31,6 +31,7 @@ bool manual_ota::begin()
     status = state::INIT;
     max_buffer_size_ = size_ * 1024;
     if (mode_ == mode::BATCH) {
+#ifdef CONFIG_ESP_HTTP_CLIENT_ENABLE_CUSTOM_TRANSPORT
         esp_transport_handle_t tcp = esp_transport_tcp_init();
         ssl_ = esp_transport_batch_tls_init(tcp, max_buffer_size_);
         http_.config_.transport = ssl_;
@@ -40,7 +41,10 @@ bool manual_ota::begin()
         if (!esp_transport_batch_set_cn(ssl_, common_name_)) {
             return fail();
         }
-
+#else
+        ESP_LOGE(TAG, "mode::BATCH Cannot be used without CONFIG_ESP_HTTP_CLIENT_ENABLE_CUSTOM_TRANSPORT");
+        return false;
+#endif
     }
 
     if (!http_.init()) {
@@ -76,7 +80,7 @@ bool manual_ota::begin()
 bool manual_ota::perform()
 {
     if (status != state::IMAGE_CHECK && status != state::START) {
-        ESP_LOGE(TAG, "Invalid state");
+        ESP_LOGE(TAG, "Invalid state for manual_ota::perform");
         return false;
     }
     esp_err_t err = esp_http_client_open(http_.handle_, 0);

components/esp_modem/test/target_ota/components/manual_ota/transport_batch_tls.cpp

@@ -12,7 +12,8 @@
 
 class TlsTransport: public Tls {
 public:
-    explicit TlsTransport(esp_transport_handle_t parent) : Tls(), transport_(parent), read_len(0), offset(0) {}
+    explicit TlsTransport(esp_transport_handle_t parent):
+        Tls(), transport_(parent),  last_timeout(0), read_len(0), offset(0) {}
     int send(const unsigned char *buf, size_t len) override;
     int recv(unsigned char *buf, size_t len) override;
     static bool set_func(esp_transport_handle_t tls_transport);
@@ -122,7 +123,10 @@ int TlsTransport::transport::connect(esp_transport_handle_t t, const char *host,
         ESP_LOGI(TAG, "Failed to handshake");
         return ret;
     }
-    tls->get_session();
+    if (!tls->get_session()) {
+        // we're not able to save session, report an error and continue (next connection will be slower)
+        ESP_LOGW(TAG, "Failed to save session");
+    }
     ESP_LOGI(TAG, "After handshake");
     return 0;
 }
@@ -238,7 +242,7 @@ bool TlsTransport::prepare_buffer(size_t max_size)
     return true;
 }
 
-int esp_transport_batch_tls_pre_read(esp_transport_handle_t t, int len, int timeout_ms)
+int esp_transport_batch_tls_pre_read(esp_transport_handle_t t, size_t len, int timeout_ms)
 {
     auto tls = static_cast<TlsTransport *>(esp_transport_get_context_data(t));
     return tls->preread(len, timeout_ms);

components/esp_modem/test/target_ota/components/manual_ota/transport_batch_tls.hpp

@@ -22,7 +22,7 @@ esp_transport_handle_t esp_transport_batch_tls_init(esp_transport_handle_t paren
  * @param timeout_ms Timeout in ms
  * @return true If read from the parent transport completed successfully
  */
-bool esp_transport_batch_tls_pre_read(esp_transport_handle_t t, int len, int timeout_ms);
+bool esp_transport_batch_tls_pre_read(esp_transport_handle_t t, size_t len, int timeout_ms);
 
 /**
  * @brief Set the CA Certificate to verify the server

components/esp_modem/test/target_ota/main/ota_test.cpp

@@ -50,7 +50,9 @@ class StatusHandler {
 
     void remove_mqtt()
     {
+#if ESP_IDF_VERSION >= ESP_IDF_VERSION_VAL(5, 1, 0)
         esp_mqtt_client_unregister_event(mqtt, MQTT_EVENT_ANY, on_event);
+#endif
         mqtt = nullptr;
     }
 
@@ -152,6 +154,10 @@ void ota_task(void *ctx)
     ota.http_.config_.cert_pem = ca_cert_pem;
     ota.size_ = 32;
     ota.common_name_ = CONFIG_TEST_OTA_CN;
+#ifndef CONFIG_ESP_HTTP_CLIENT_ENABLE_CUSTOM_TRANSPORT
+    // will have to use NORMAL mode, before custom transport is supported in IDF
+    ota.mode_ = manual_ota::mode::NORMAL;
+#endif
 
     ota.begin();
     while (true) {
@@ -257,11 +263,13 @@ extern "C" void app_main(void)
 
 
     esp_modem::SignalGroup ota_done{};
+#if ESP_IDF_VERSION >= ESP_IDF_VERSION_VAL(5, 2, 0)
     // now stop the LCP keepalive before performing OTA
     esp_netif_ppp_config_t cfg;
     ESP_ERROR_CHECK(esp_netif_ppp_get_params(esp_netif, &cfg));
     cfg.ppp_lcp_echo_disabled = true;
     ESP_ERROR_CHECK(esp_netif_ppp_set_params(esp_netif, &cfg));
+#endif
 
     // Run the OTA in a separate task to keep sending commands to the modem at the same time
     xTaskCreate(ota_task, "ota_task", 8192, &ota_done, 5, nullptr);

components/esp_modem/test/target_ota/sdkconfig.defaults

@@ -1,10 +1,13 @@
+CONFIG_ESPTOOLPY_FLASHSIZE_4MB=y
 CONFIG_PARTITION_TABLE_TWO_OTA=y
 CONFIG_TEST_USE_VFS_TERM=y
-CONFIG_TEST_OTA_URI="https://raw.githubusercontent.com/david-cermak/esp-network-examples/test/ota/hello_world.bin"
+CONFIG_TEST_OTA_URI="https://raw.githubusercontent.com/espressif/esp-protocols/master/components/esp_modem/test/target_ota/bin/blink.bin"
 CONFIG_TEST_OTA_CA_CERT="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"
 CONFIG_TEST_OTA_CN="github.com"
 CONFIG_COMPILER_CXX_EXCEPTIONS=y
-CONFIG_ESP_HTTP_CLIENT_ENABLE_CUSTOM_TRANSPORT=y
+
+# This is not supported in IDF yet
+# CONFIG_ESP_HTTP_CLIENT_ENABLE_CUSTOM_TRANSPORT=y
 CONFIG_ESP_SYSTEM_PANIC_PRINT_HALT=y
 CONFIG_ESP_MAIN_TASK_STACK_SIZE=8192
 CONFIG_LWIP_PPP_SUPPORT=y