text: /**
   * Copyright (c) 2015 - 2019, Nordic Semiconductor ASA
   *
   * All rights reserved.
   *
   * Redistribution and use in source and binary forms, with or without modification,
   * are permitted provided that the following conditions are met:
   *
   * 1. Redistributions of source code must retain the above copyright notice, this
   *    list of conditions and the following disclaimer.
   *
   * 2. Redistributions in binary form, except as embedded into a Nordic
   *    Semiconductor ASA integrated circuit in a product or a software update for
   *    such product, must reproduce the above copyright notice, this list of
   *    conditions and the following disclaimer in the documentation and/or other
   *    materials provided with the distribution.
   *
   * 3. Neither the name of Nordic Semiconductor ASA nor the names of its
   *    contributors may be used to endorse or promote products derived from this
   *    software without specific prior written permission.
   *
   * 4. This software, with or without modification, must only be used with a
   *    Nordic Semiconductor ASA integrated circuit.
   *
   * 5. Any software provided in binary form under this license must not be reverse
   *    engineered, decompiled, modified and/or disassembled.
   *
   * THIS SOFTWARE IS PROVIDED BY NORDIC SEMICONDUCTOR ASA "AS IS" AND ANY EXPRESS
   * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
   * OF MERCHANTABILITY, NONINFRINGEMENT, AND FITNESS FOR A PARTICULAR PURPOSE ARE
   * DISCLAIMED. IN NO EVENT SHALL NORDIC SEMICONDUCTOR ASA OR CONTRIBUTORS BE
   * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
   * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
   * GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
   * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
   *
   */
  #include <string.h>
  #include "coap_api.h"
  #include "coap_message.h"
  #include "coap_codes.h"
  #include "lwm2m.h"
  
  
  uint32_t lwm2m_respond_with_code(coap_msg_code_t code, coap_message_t * p_request)
  {
      NULL_PARAM_CHECK(p_request);
  
      // Application helper function, no need for mutex.
      coap_message_conf_t response_config;
      memset (&response_config, 0, sizeof(coap_message_conf_t));
  
      if (p_request->header.type == COAP_TYPE_NON)
      {
          response_config.type = COAP_TYPE_NON;
      }
      else if (p_request->header.type == COAP_TYPE_CON)
      {
          response_config.type = COAP_TYPE_ACK;
      }
  
      // PIGGY BACKED RESPONSE
      response_config.code              = code;
      response_config.id                = p_request->header.id;
      response_config.port.port_number  = p_request->port.port_number;
  
      // Copy token.
      memcpy(&response_config.token[0], &p_request->token[0], p_request->header.token_len);
      // Copy token length.
      response_config.token_len = p_request->header.token_len;
  
      coap_message_t * p_response;
      uint32_t err_code = coap_message_new(&p_response, &response_config);
      if (err_code != NRF_SUCCESS)
      {
          return err_code;
      }
  
      err_code = coap_message_remote_addr_set(p_response, &p_request->remote);
      if (err_code != NRF_SUCCESS)
      {
          (void)coap_message_delete(p_response);
          return err_code;
      }
  
      memcpy(&p_response->remote, &p_request->remote, sizeof(coap_remote_t));
  
      uint32_t msg_handle;
      err_code = coap_message_send(&msg_handle, p_response);
      if (err_code != NRF_SUCCESS)
      {
          (void)coap_message_delete(p_response);
          return err_code;
      }
  
      err_code = coap_message_delete(p_response);
  
      return err_code;
  }
  
  
  uint32_t lwm2m_respond_with_payload(uint8_t * p_payload, uint16_t payload_len, coap_message_t * p_request)
  {
      NULL_PARAM_CHECK(p_request);
      NULL_PARAM_CHECK(p_payload);
  
      // Application helper function, no need for mutex.
      coap_message_conf_t response_config;
      memset (&response_config, 0, sizeof(coap_message_conf_t));
  
      if (p_request->header.type == COAP_TYPE_NON)
      {
          response_config.type = COAP_TYPE_NON;
      }
      else if (p_request->header.type == COAP_TYPE_CON)
      {
          response_config.type = COAP_TYPE_ACK;
      }
  
      // PIGGY BACKED RESPONSE
      response_config.code              = COAP_CODE_205_CONTENT;
      response_config.id                = p_request->header.id;
      response_config.port.port_number  = p_request->port.port_number;
  
      // Copy token.
      memcpy(&response_config.token[0], &p_request->token[0], p_request->header.token_len);
      // Copy token length.
      response_config.token_len = p_request->header.token_len;
  
      coap_message_t * p_response;
      uint32_t err_code = coap_message_new(&p_response, &response_config);
      if (err_code != NRF_SUCCESS)
      {
          return err_code;
      }
  
      err_code = coap_message_payload_set(p_response, p_payload, payload_len);
      if (err_code != NRF_SUCCESS)
      {
          (void)coap_message_delete(p_response);
          return err_code;
      }
  
      err_code = coap_message_remote_addr_set(p_response, &p_request->remote);
      if (err_code != NRF_SUCCESS)
      {
          (void)coap_message_delete(p_response);
          return err_code;
      }
  
      memcpy(&p_response->remote, &p_request->remote, sizeof(coap_remote_t));
  
      uint32_t msg_handle;
      err_code = coap_message_send(&msg_handle, p_response);
      if (err_code != NRF_SUCCESS)
      {
          (void)coap_message_delete(p_response);
          return err_code;
      }
  
      err_code = coap_message_delete(p_response);
  
      return err_code;
  }
  