bleconfig.c 18.1 KB
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564 565 566 567 568 569 570 571 572 573 574 575 576 577 578 579
/* Copyright (c) 2013 Nordic Semiconductor. All Rights Reserved.
 *
 * The information contained herein is property of Nordic Semiconductor ASA.
 * Terms and conditions of usage are described in detail in NORDIC
 * SEMICONDUCTOR STANDARD SOFTWARE LICENSE AGREEMENT.
 *
 * Licensees are granted free, non-transferable use of the information. NO
 * WARRANTY of ANY KIND is provided. This heading must NOT be removed from
 * the file.
 *
 */

/* clang-format off */

/** @file
 *
 * @defgroup iot_sdk_tcp_server main.c
 * @{
 * @ingroup iot_sdk_app_lwip
 * @brief This file contains the source code for LwIP TCP Server sample application.
 *
 */

#include <stdbool.h>
#include <stdint.h>
#include "boards.h"
#include "app_timer_appsh.h"
#include "app_scheduler.h"
#include "app_button.h"
#include "nordic_common.h"
#include "softdevice_handler_appsh.h"
#include "ble_advdata.h"
#include "ble_srv_common.h"
#include "ble_ipsp.h"
#include "ble_6lowpan.h"
#include "mem_manager.h"
#include "app_trace.h"

/*
 * arm-none-eabi-gcc has BYTE_ORDER already defined, so in order to avoid
 * warnings in lwip, we have to undefine it
 *
 * TODO: Check if in the future versions of nRF5 SDK that changes.
 *       Current version of nRF51 SDK: 0.8.0
 *                          nRF5 SDK:  0.9.0
 */
#undef BYTE_ORDER
#include "lwip/init.h"
#include "lwip/inet6.h"
#include "lwip/ip6.h"
#include "lwip/ip6_addr.h"
#include "lwip/netif.h"
/*lint -save -e607 */
#include "lwip/tcp.h"
/*lint -restore */
#include "lwip/timers.h"
#include "nrf_platform_port.h"
#include "app_util_platform.h"

#define DEVICE_NAME                         "LwIPTCPServer"                                         /**< Device name used in BLE undirected advertisement. */

#define APP_TIMER_PRESCALER                 NRF51_DRIVER_TIMER_PRESCALER                            /**< Value of the RTC1 PRESCALER register. */
#define APP_TIMER_MAX_TIMERS                1                                                       /**< Maximum number of simultaneously created timers. */
#define APP_TIMER_OP_QUEUE_SIZE             1
#define LWIP_SYS_TIMER_INTERVAL             APP_TIMER_TICKS(250, APP_TIMER_PRESCALER)               /**< Interval for timer used as trigger to send. */

#define SCHED_MAX_EVENT_DATA_SIZE           128                                                     /**< Maximum size of scheduler events. */
#define SCHED_QUEUE_SIZE                    12                                                      /**< Maximum number of events in the scheduler queue. */

#define ADVERTISING_LED                     BSP_LED_0_MASK                                          /**< Is on when device is advertising. */
#define CONNECTED_LED                       BSP_LED_1_MASK                                          /**< Is on when device is connected. */
#define TCP_CONNECTED_LED                   BSP_LED_2_MASK                                          /**< Is on when device is connected. */
#define DISPLAY_LED_0                       BSP_LED_0_MASK                                          /**< LED used for displaying mod 4 of data payload received on UDP port. */
#define DISPLAY_LED_1                       BSP_LED_1_MASK                                          /**< LED used for displaying mod 4 of data payload received on UDP port. */
#define DISPLAY_LED_2                       BSP_LED_2_MASK                                          /**< LED used for displaying mod 4 of data payload received on UDP port. */
#define DISPLAY_LED_3                       BSP_LED_3_MASK                                          /**< LED used for displaying mod 4 of data payload received on UDP port. */
#define ALL_APP_LED                        (BSP_LED_0_MASK | BSP_LED_1_MASK | \
    BSP_LED_2_MASK | BSP_LED_3_MASK)                        /**< Define used for simultaneous operation of all application LEDs. */

#define APP_ADV_TIMEOUT                     0                                                       /**< Time for which the device must be advertising in non-connectable mode (in seconds). 0 disables timeout. */
#define APP_ADV_ADV_INTERVAL                MSEC_TO_UNITS(100, UNIT_0_625_MS)                       /**< The advertising interval. This value can vary between 100ms to 10.24s). */

#define DEAD_BEEF                           0xDEADBEEF                                              /**< Value used as error code on stack dump, can be used to identify stack location on stack unwind. */

#define APPL_LOG                            app_trace_log                                           /**< Macro for logging application messages on UART, in case ENABLE_DEBUG_LOG_SUPPORT is not defined, no logging occurs. */
#define APPL_DUMP                           app_trace_dump                                          /**< Macro for dumping application data on UART, in case ENABLE_DEBUG_LOG_SUPPORT is not defined, no logging occurs. */

#define TCP_SERVER_PORT                     9000                                                    /**< TCP server listen port number. */
#define TCP_DATA_SIZE                       8                                                       /**< UDP Data size sent on remote. */

typedef enum
{
  TCP_STATE_IDLE,
  TCP_STATE_REQUEST_CONNECTION,
  TCP_STATE_CONNECTED,
  TCP_STATE_DATA_TX_IN_PROGRESS,
  TCP_STATE_DISCONNECTED
}tcp_state_t;

eui64_t                                     eui64_local_iid;                                        /**< Local EUI64 value that is used as the IID for*/
static ble_gap_adv_params_t                 m_adv_params;                                           /**< Parameters to be passed to the stack when starting advertising. */
static app_timer_id_t                       m_sys_timer_id;                                         /**< System Timer used to service LwIP timers periodically. */
static struct tcp_pcb                     * mp_tcp_port;                                            /**< TCP Port to listen on. */
static tcp_state_t                          m_tcp_state;                                            /**< TCP State information. */




/**@brief Function for error handling, which is called when an error has occurred.
 *
 * @warning This handler is an example only and does not fit a final product. You need to analyse
 *          how your product is supposed to react in case of error.
 *
 * @param[in] error_code  Error code supplied to the handler.
 * @param[in] line_num    Line number where the handler is called.
 * @param[in] p_file_name Pointer to the file name.
 */
void app_error_handler(uint32_t error_code, uint32_t line_num, const uint8_t * p_file_name)
{
  //Halt the application and notify of error using the LEDs.
  APPL_LOG("[** ASSERT **]: Error 0x%08lX, Line %ld, File %s\r\n",error_code, line_num, p_file_name);
  LEDS_ON(ALL_APP_LED);
  for(;;)
  {
  }

  // @note: In case on assert, it is desired to only recover and reset, uncomment the line below.
  //NVIC_SystemReset();
}


/**@brief Callback function for asserts in the SoftDevice.
 *
 * @details This function will be called in case of an assert in the SoftDevice.
 *
 * @warning This handler is an example only and does not fit a final product. You need to analyse
 *          how your product is supposed to react in case of Assert.
 * @warning On assert from the SoftDevice, the system can only recover on reset.
 *
 * @param[in]   line_num   Line number of the failing ASSERT call.
 * @param[in]   file_name  File name of the failing ASSERT call.
 */
void assert_nrf_callback(uint16_t line_num, const uint8_t * p_file_name)
{
  app_error_handler(DEAD_BEEF, line_num, p_file_name);
}


/**@brief Function for the LEDs initialization.
 *
 * @details Initializes all LEDs used by this application.
 */
static void leds_init(void)
{
  // Configure application LED pins.
  LEDS_CONFIGURE(ALL_APP_LED);

  // Turn off all LED on initialization.
  LEDS_OFF(ALL_APP_LED);
}


/**@brief Function for initializing the Advertising functionality.
 *
 * @details Encodes the required advertising data and passes it to the stack.
 *          Also builds a structure to be passed to the stack when starting advertising.
 */
static void advertising_init(void)
{
  uint32_t                err_code;
  ble_advdata_t           advdata;
  uint8_t                 flags = BLE_GAP_ADV_FLAG_BR_EDR_NOT_SUPPORTED;
  ble_gap_conn_sec_mode_t sec_mode;
  ble_gap_addr_t          my_addr;

  BLE_GAP_CONN_SEC_MODE_SET_OPEN(&sec_mode);

  err_code = sd_ble_gap_device_name_set(&sec_mode,
      (const uint8_t *)DEVICE_NAME,
      strlen(DEVICE_NAME));
  APP_ERROR_CHECK(err_code);

  err_code = sd_ble_gap_address_get(&my_addr);
  APP_ERROR_CHECK(err_code);

  my_addr.addr[5]   = 0x00;
  my_addr.addr_type = BLE_GAP_ADDR_TYPE_PUBLIC;

  err_code = sd_ble_gap_address_set(&my_addr);
  APP_ERROR_CHECK(err_code);

  IPV6_EUI64_CREATE_FROM_EUI48(eui64_local_iid.identifier,
      my_addr.addr,
      my_addr.addr_type);

  ble_uuid_t adv_uuids[] =
  {
    {BLE_UUID_IPSP_SERVICE,         BLE_UUID_TYPE_BLE}
  };

  //Build and set advertising data.
  memset(&advdata, 0, sizeof(advdata));

  advdata.name_type               = BLE_ADVDATA_FULL_NAME;
  advdata.flags                   = flags;
  advdata.uuids_complete.uuid_cnt = sizeof(adv_uuids) / sizeof(adv_uuids[0]);
  advdata.uuids_complete.p_uuids  = adv_uuids;

  err_code = ble_advdata_set(&advdata, NULL);
  APP_ERROR_CHECK(err_code);

  //Initialize advertising parameters (used when starting advertising).
  memset(&m_adv_params, 0, sizeof(m_adv_params));

  m_adv_params.type        = BLE_GAP_ADV_TYPE_ADV_IND;
  m_adv_params.p_peer_addr = NULL;                             // Undirected advertisement.
  m_adv_params.fp          = BLE_GAP_ADV_FP_ANY;
  m_adv_params.interval    = APP_ADV_ADV_INTERVAL;
  m_adv_params.timeout     = APP_ADV_TIMEOUT;
}


/**@brief Function for starting advertising.
*/
static void advertising_start(void)
{
  uint32_t err_code;

  err_code = sd_ble_gap_adv_start(&m_adv_params);
  APP_ERROR_CHECK(err_code);

  LEDS_ON(ADVERTISING_LED);
}


/**@brief Function for handling the Application's BLE Stack events.
 *
 * @param[in]   p_ble_evt   Bluetooth stack event.
 */
static void on_ble_evt(ble_evt_t * p_ble_evt)
{
  switch (p_ble_evt->header.evt_id)
  {
    case BLE_GAP_EVT_CONNECTED:
      APPL_LOG ("[APPL]: Connected.\r\n");
      break;
    case BLE_GAP_EVT_DISCONNECTED:
      APPL_LOG ("[APPL]: Disconnected.\r\n");
      advertising_start();
      break;
    default:
      break;
  }
}


/**@brief Function for dispatching a BLE stack event to all modules with a BLE stack event handler.
 *
 * @details This function is called from the BLE Stack event interrupt handler after a BLE stack
 *          event has been received.
 *
 * @param[in]   p_ble_evt   Bluetooth stack event.
 */
static void ble_evt_dispatch(ble_evt_t * p_ble_evt)
{
  ble_ipsp_evt_handler(p_ble_evt);
  on_ble_evt(p_ble_evt);
}


/**@brief Function for initializing the BLE stack.
 *
 * @details Initializes the SoftDevice and the BLE event interrupt.
 */
static void ble_stack_init(void)
{
  uint32_t err_code;

  // Initialize the SoftDevice handler module.
  SOFTDEVICE_HANDLER_APPSH_INIT(NRF_CLOCK_LFCLKSRC_XTAL_20_PPM, true);

  // Register with the SoftDevice handler module for BLE events.
  err_code = softdevice_ble_evt_handler_set(ble_evt_dispatch);
  APP_ERROR_CHECK(err_code);
}


/**@brief Function for the Event Scheduler initialization.
*/
static void scheduler_init(void)
{
  APP_SCHED_INIT(SCHED_MAX_EVENT_DATA_SIZE, SCHED_QUEUE_SIZE);
}


/**@brief Function to TCP port.
 *
 * @details Function to close the TCP port and reset any information on the port.
 */
static void tcp_port_close(struct tcp_pcb * p_pcb)
{
  m_tcp_state = TCP_STATE_REQUEST_CONNECTION;

  //Reset all information set on and/or callback registered for the  port.
  tcp_arg(p_pcb, NULL);
  tcp_sent(p_pcb, NULL);
  tcp_recv(p_pcb, NULL);
  tcp_err(p_pcb, NULL);
  tcp_poll(p_pcb, NULL, 0);

  UNUSED_VARIABLE(tcp_close(p_pcb));

  LEDS_OFF((DISPLAY_LED_0 | DISPLAY_LED_1 | DISPLAY_LED_2 | DISPLAY_LED_3));
  LEDS_ON(CONNECTED_LED);
}


/**@brief TCP Port Write complete callback.
 *
 * @details Calbback registered to be notified of the write complete event on the TCP port.
 *          In case write complete is notified with 'zero' length, port is closed.
 *
 * @param[in]   p_arg     Receive argument set on the port.
 * @param[in]   p_pcb     PCB identifier of the port.
 * @param[in]   len       Length of data written successfully.
 *
 * @retval ERR_OK.
 */
static err_t tcp_write_complete(void           * p_arg,
    struct tcp_pcb * p_pcb,
    u16_t            len)
{
  UNUSED_PARAMETER(p_arg);
  UNUSED_PARAMETER(p_pcb);

  if (len != 0)
  {
    //Write complete, reset the state to connected from transmit pending.
    m_tcp_state = TCP_STATE_CONNECTED;
  }
  else
  {
    //Something is not right on the port, close the port.
    tcp_port_close(mp_tcp_port);
  }
  return ERR_OK;
}


/**@brief Send test data on the port.
 *
 * @details Sends TCP data in Request of size 8 in format described in description above.
 *
 * @param[in]   p_pcb     PCB identifier of the port.
 */
static void tcp_send_data(struct tcp_pcb * p_pcb, uint32_t sequence_number)
{
  err_t  err = ERR_OK;

  if (m_tcp_state != TCP_STATE_DATA_TX_IN_PROGRESS)
  {
    //Register callback to get notification of data reception is complete.
    tcp_sent(p_pcb, tcp_write_complete);
    uint8_t tcp_data[TCP_DATA_SIZE];

    tcp_data[0] = (uint8_t )((sequence_number >> 24) & 0x000000FF);
    tcp_data[1] = (uint8_t )((sequence_number >> 16) & 0x000000FF);
    tcp_data[2] = (uint8_t )((sequence_number >> 8)  & 0x000000FF);
    tcp_data[3] = (uint8_t )(sequence_number         & 0x000000FF);

    tcp_data[4] = 'P';
    tcp_data[5] = 'o';
    tcp_data[6] = 'n';
    tcp_data[7] = 'g';

    //Enqueue data for transmission.
    err = tcp_write(p_pcb, tcp_data, TCP_DATA_SIZE, 1);

    if (err != ERR_OK)
    {
      APPL_LOG ("[APPL]: Failed to send TCP packet, reason %d\r\n", err);
    }
    else
    {
      m_tcp_state = TCP_STATE_DATA_TX_IN_PROGRESS;
    }
  }
  else
  {
    //Wait for tx to be complete.
  }
}


/**@brief Callback registered for receiving data on the TCP Port.
 *
 * @param[in]   p_arg     Receive argument set on the TCP port.
 * @param[in]   p_pcb     TCP PCB on which data is received.
 * @param[in]   p_buffer  Buffer with received data.
 * @param[in]   err       Event result indicating error associated with the receive,
 *                        if any, else ERR_OK.
 */
err_t tcp_recv_data_handler(void           * p_arg,
    struct tcp_pcb * p_pcb,
    struct pbuf    * p_buffer,
    err_t            err)
{
  APPL_LOG ("[APPL]: >> TCP Data.\r\n");

  //Check event result before proceeding.
  if (err == ERR_OK)
  {
    uint8_t *p_data = p_buffer->payload;

    if (p_buffer->len == TCP_DATA_SIZE)
    {
      uint32_t sequence_number = 0;

      sequence_number  = ((p_data[0] << 24) & 0xFF000000);
      sequence_number |= ((p_data[1] << 16) & 0x00FF0000);
      sequence_number |= ((p_data[2] << 8)  & 0x0000FF00);
      sequence_number |= (p_data[3]         & 0x000000FF);

      LEDS_OFF(ALL_APP_LED);

      if (sequence_number & 0x00000001)
      {
        LEDS_ON(DISPLAY_LED_0);
      }
      if (sequence_number & 0x00000002)
      {
        LEDS_ON(DISPLAY_LED_1);
      }
      if (sequence_number & 0x00000004)
      {
        LEDS_ON(DISPLAY_LED_2);
      }
      if (sequence_number & 0x00000008)
      {
        LEDS_ON(DISPLAY_LED_3);
      }

      //Send Response
      tcp_send_data(p_pcb, sequence_number);
    }
    else
    {
      APPL_LOG ("[APPL]: TCP data received in incorrect format.\r\n");
    }
    // All is good with the data received, process it.
    tcp_recved(p_pcb, p_buffer->tot_len);
    UNUSED_VARIABLE(pbuf_free(p_buffer));
  }
  else
  {
    //Free the buffer in case its not NULL.
    if (p_buffer != NULL)
    {
      UNUSED_VARIABLE(pbuf_free(p_buffer));
    }

    //Something is not right with the port, close the port.
    tcp_port_close(mp_tcp_port);
  }

  return ERR_OK;
}





/**@brief Function for initializing IP stack.
 *
 * @details Initialize the IP Stack and its driver.
 */
static void ip_stack_init(void)
{
  uint32_t err_code = nrf51_sdk_mem_init();
  APP_ERROR_CHECK(err_code);

  //Initialize LwIP stack.
  lwip_init();

  //Initialize LwIP stack driver.
  err_code = nrf51_driver_init();
  APP_ERROR_CHECK(err_code);
}


/**@brief Timer callback used for periodic servicing of LwIP protocol timers.
 *
 * @details Timer callback used for periodic servicing of LwIP protocol timers.
 *
 * @param[in]   p_context   Pointer used for passing context. No context used in this application.
 */
static void system_timer_callback(void * p_context)
{
  UNUSED_VARIABLE(p_context);
  sys_check_timeouts();
}


/**@brief Function for the Timer initialization.
 *
 * @details Initializes the timer module. This creates and starts application timers.
 */
static void timers_init(void)
{
  uint32_t err_code;

  // Initialize timer module.
  APP_TIMER_APPSH_INIT(APP_TIMER_PRESCALER, APP_TIMER_MAX_TIMERS, APP_TIMER_OP_QUEUE_SIZE, true);

  // Create timers.
  err_code = app_timer_create(&m_sys_timer_id,
      APP_TIMER_MODE_REPEATED,
      system_timer_callback);
  APP_ERROR_CHECK(err_code);
}


/**@brief Function to handle interface up event. */
void nrf51_driver_interface_up(void)
{
  uint32_t err_code;

  APPL_LOG ("[APPL]: IPv6 interface up.\r\n");

  sys_check_timeouts();

  m_tcp_state = TCP_STATE_REQUEST_CONNECTION;

  err_code = app_timer_start(m_sys_timer_id, LWIP_SYS_TIMER_INTERVAL, NULL);
  APP_ERROR_CHECK(err_code);

  LEDS_OFF(ADVERTISING_LED);
  LEDS_ON(CONNECTED_LED);
}


/**@brief Function to handle interface down event. */
void nrf51_driver_interface_down(void)
{
  uint32_t err_code;

  APPL_LOG ("[APPL]: IPv6 interface down.\r\n");

  err_code = app_timer_stop(m_sys_timer_id);
  APP_ERROR_CHECK(err_code);

  LEDS_OFF((DISPLAY_LED_0 | DISPLAY_LED_1 | DISPLAY_LED_2 | DISPLAY_LED_3));
  LEDS_ON(ADVERTISING_LED);

  m_tcp_state = TCP_STATE_DISCONNECTED;
}

void bleconfig_init(void) {
  //Initialize.
  app_trace_init();
  leds_init();
  timers_init();
  ble_stack_init();
  advertising_init();
  ip_stack_init ();
  scheduler_init();

  APPL_LOG ("\r\n");
  APPL_LOG ("[APPL]: Init done.\r\n");

  //Start execution.
  advertising_start();
}

void bleconfig_poll(void) {
  //Execute event schedule.
  app_sched_execute();
}