Convert provisioning code to C++

src/TTNProvisioning.h

@@ -0,0 +1,67 @@
+/*******************************************************************************
+ * 
+ * ttn-esp32 - The Things Network device library for ESP-IDF / SX127x
+ * 
+ * Copyright (c) 2018 Manuel Bleichenbacher
+ * 
+ * Licensed under MIT License
+ * https://opensource.org/licenses/MIT
+ *
+ * Task listening on a UART port for provisioning commands.
+ *******************************************************************************/
+
+#ifndef _ttnprovisioning_h_
+#define _ttnprovisioning_h_
+
+#include "lmic/oslmic.h"
+#include "nvs_flash.h"
+
+
+class TTNProvisioning
+{
+public:
+    TTNProvisioning();
+
+    void startTask();
+    bool haveKeys();
+    bool decodeKeys(const char *dev_eui, const char *app_eui, const char *app_key);
+    bool fromMAC(const char *app_eui, const char *app_key);
+    bool saveKeys();
+    bool restoreKeys(bool silent);
+
+private:
+    void provisioningTask();
+    bool decode(bool incl_dev_eui, const char *dev_eui, const char *app_eui, const char *app_key);
+    void addLineData(int numBytes);
+    void detectLineEnd(int start_at);
+    void processLine();
+    bool readNvsValue(nvs_handle handle, const char* key, uint8_t* data, size_t expected_length, bool silent);
+    bool writeNvsValue(nvs_handle handle, const char* key, const uint8_t* data, size_t len);
+
+#if defined(CONFIG_TTN_PROVISION_UART_CONFIG_YES)
+    void configUART();
+#endif
+
+    static bool hexStrToBin(const char *hex, uint8_t *buf, int len);
+    static int hexTupleToByte(const char *hex);
+    static int hexDigitToVal(char ch);
+    static void binToHexStr(const uint8_t* buf, int len, char* hex);
+    static char valToHexDigit(int val);
+    static void swapBytes(uint8_t* buf, int len);
+    static bool isAllZeros(const uint8_t* buf, int len);
+
+private:
+    bool have_keys = false;
+
+#if !defined(CONFIG_TTN_PROVISION_UART_NONE)
+    QueueHandle_t uart_queue;
+    char* line_buf;
+    int line_length;
+    uint8_t last_line_end_char;
+    bool quit_task;
+#endif
+
+    friend void ttn_provisioning_task_caller(void* pvParameter);
+};
+
+#endif