lwip: Fix sntp custom options if sntp_get_system_time used

components/lwip/port/esp32/include/sntp/sntp_get_set_time.h

@@ -0,0 +1,55 @@
+// Copyright 2021 Espressif Systems (Shanghai) PTE LTD
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#ifndef __SNTP_GET_SET_TIME_H__
+#define __SNTP_GET_SET_TIME_H__
+
+#include <stdint.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+
+/*
+ * Declarations of functions used in lwipopts.h to redefine
+ * default sntp macros, such as:
+ * - SNTP_UPDATE_DELAY()
+ * - SNTP_SET_SYSTEM_TIME_US()
+ * - SNTP_GET_SYSTEM_TIME()
+ */
+
+/*
+ * @brief Get the sync interval of SNTP operation
+ * Full definition is provided in IDF's layer in esp_sntp.c
+ */
+uint32_t sntp_get_sync_interval(void);
+
+/**
+ * @brief system time setter used in the sntp module
+ * @note The lwip sntp uses u32_t types for sec and us arguments
+ */
+void sntp_set_system_time(uint32_t sec, uint32_t us);
+
+/**
+ * @brief system time getter used in the sntp module
+ * @note The lwip sntp uses u32_t types for sec and us arguments
+ */
+void sntp_get_system_time(uint32_t* sec, uint32_t* us);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif //__SNTP_GET_SET_TIME_H__