tcp_transport: Fix error handling of esp_tls_init()

components/tcp_transport/private_include/esp_transport_internal.h

@@ -57,6 +57,7 @@ enum tcp_transport_errors {
     ERR_TCP_TRANSPORT_CONNECTION_CLOSED_BY_FIN,
     ERR_TCP_TRANSPORT_CONNECTION_FAILED,
     ERR_TCP_TRANSPORT_SETOPT_FAILED,
+    ERR_TCP_TRANSPORT_NO_MEM,
 };
 
 /**

components/tcp_transport/transport.c

@@ -345,6 +345,9 @@ void capture_tcp_transport_error(esp_transport_handle_t t, enum tcp_transport_er
         case ERR_TCP_TRANSPORT_SETOPT_FAILED:
             err_handle->last_error = ESP_ERR_ESP_TLS_SOCKET_SETOPT_FAILED;
             break;
+        case ERR_TCP_TRANSPORT_NO_MEM:
+            err_handle->last_error = ESP_ERR_NO_MEM;
+            break;
     }
 }
 

components/tcp_transport/transport_ssl.c

@@ -104,6 +104,11 @@ static int esp_tls_connect(esp_transport_handle_t t, const char *host, int port,
 
     ssl->ssl_initialized = true;
     ssl->tls = esp_tls_init();
+    if (ssl->tls == NULL) {
+        ESP_LOGE(TAG, "Failed to initialize new connection object");
+        capture_tcp_transport_error(t, ERR_TCP_TRANSPORT_NO_MEM);
+        return -1;
+    }
     if (esp_tls_conn_new_sync(host, strlen(host), port, &ssl->cfg, ssl->tls) <= 0) {
         ESP_LOGE(TAG, "Failed to open a new connection");
         esp_transport_set_errors(t, ssl->tls->error_handle);