static void handle_led_request(uint32_t led_mask, coap_message_t * p_request, coap_resource_t * p_resource)
{
coap_message_conf_t response_config;
memset(&response_config, 0x00, 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_405_METHOD_NOT_ALLOWED;
// Copy message ID.
response_config.id = p_request->header.id;
// Set local port number to use.
response_config.port.port_number = LOCAL_PORT_NUM;
// 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);
APP_ERROR_CHECK(err_code);
err_code = coap_message_remote_addr_set(p_response, &p_request->remote);
APP_ERROR_CHECK(err_code);
// Handle request.
switch (p_request->header.code)
{
case COAP_CODE_GET:
{
p_response->header.code = COAP_CODE_205_CONTENT;
// Select the first common content-type between the resource and the CoAP client.
coap_content_type_t ct_to_use;
err_code = coap_message_ct_match_select(&ct_to_use, p_request, p_resource);
if (err_code != NRF_SUCCESS)
{
// None of the accept content formats are supported in this resource endpoint.
p_response->header.code = COAP_CODE_415_UNSUPPORTED_CONTENT_FORMAT;
p_response->header.type = COAP_TYPE_RST;
}
else
{
// Set response payload to actual LED state.
char * response_str;
led_value_get(led_mask, ct_to_use, &response_str);
err_code = coap_message_payload_set(p_response, response_str, strlen(response_str));
APP_ERROR_CHECK(err_code);
}
break;
}
case COAP_CODE_PUT:
{
p_response->header.code = COAP_CODE_204_CHANGED;
// Change LED state according to request.
switch (p_request->p_payload[0])
{
case COMMAND_ON:
{
LEDS_ON(led_mask);
break;
}
case COMMAND_OFF:
{
LEDS_OFF(led_mask);
break;
}
case COMMAND_TOGGLE:
{
LEDS_INVERT(led_mask);
break;
}
default:
{
p_response->header.code = COAP_CODE_400_BAD_REQUEST;
break;
}
}
break;
}
default:
{
p_response->header.code = COAP_CODE_405_METHOD_NOT_ALLOWED;
break;
}
}
uint32_t msg_handle;
err_code = coap_message_send(&msg_handle, p_response);
APP_ERROR_CHECK(err_code);
err_code = coap_message_delete(p_response);
APP_ERROR_CHECK(err_code);
}
static void led3_callback(coap_resource_t * p_resource, coap_message_t * p_request)
{
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_405_METHOD_NOT_ALLOWED;
// Copy message ID.
response_config.id = p_request->header.id;
// 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);
APP_ERROR_CHECK(err_code);
err_code = coap_message_remote_addr_set(p_response, &p_request->remote);
APP_ERROR_CHECK(err_code);
// Handle request.
switch (p_request->header.code)
{
case COAP_CODE_GET:
{
p_response->header.code = COAP_CODE_205_CONTENT;
// Select the first common content type between the resource and the CoAP client.
coap_content_type_t ct_to_use;
err_code = coap_message_ct_match_select(&ct_to_use, p_request, p_resource);
if (err_code != NRF_SUCCESS)
{
// None of the accepted content formats are supported in this resource endpoint.
p_response->header.code = COAP_CODE_415_UNSUPPORTED_CONTENT_FORMAT;
p_response->header.type = COAP_TYPE_RST;
}
else
{
if (coap_message_opt_present(p_request, COAP_OPT_OBSERVE) == NRF_SUCCESS)
{
// Locate the option and check the value.
uint32_t observe_option = 0;
uint8_t index;
for (index = 0; index < p_request->options_count; index++)
{
if (p_request->options[index].number == COAP_OPT_OBSERVE)
{
err_code = coap_opt_uint_decode(&observe_option,
p_request->options[index].length,
p_request->options[index].p_data);
if (err_code != NRF_SUCCESS)
{
APP_ERROR_CHECK(err_code);
}
break;
}
}
if (observe_option == 0)
{
// Register observer, and if successful, add the Observe option in the reply.
uint32_t handle;
coap_observer_t observer;
// Set the token length.
observer.token_len = p_request->header.token_len;
// Set the resource of interest.
observer.p_resource_of_interest = p_resource;
// Set the remote.
memcpy(&observer.remote, &p_request->remote, sizeof(coap_remote_t));
// Set the token.
memcpy(observer.token, p_request->token, observer.token_len);
// Set the content format to be used for subsequent notifications.
observer.ct = ct_to_use;
err_code = coap_observe_server_register(&handle, &observer);
if (err_code == NRF_SUCCESS)
{
err_code = coap_message_opt_uint_add(p_response, COAP_OPT_OBSERVE, m_observer_sequence_num++);
APP_ERROR_CHECK(err_code);
err_code = coap_message_opt_uint_add(p_response, COAP_OPT_MAX_AGE, p_resource->expire_time);
APP_ERROR_CHECK(err_code);
}
// If the registration of the observer could not be done, handle this as a normal message.
}
else
{
uint32_t handle;
err_code = coap_observe_server_search(&handle, &p_request->remote, p_resource);
if (err_code == NRF_SUCCESS)
{
err_code = coap_observe_server_unregister(handle);
APP_ERROR_CHECK(err_code);
}
}
}
// Set response payload to the actual LED state.
char * response_str;
led_value_get(ct_to_use, &response_str);
err_code = coap_message_payload_set(p_response, response_str, strlen(response_str));
APP_ERROR_CHECK(err_code);
}
break;
}
case COAP_CODE_PUT:
{
p_response->header.code = COAP_CODE_204_CHANGED;
// Change LED state according to request.
switch (p_request->p_payload[0])
{
case COMMAND_ON:
{
LEDS_ON(LED_THREE);
break;
}
case COMMAND_OFF:
{
LEDS_OFF(LED_THREE);
break;
}
case COMMAND_TOGGLE:
{
LEDS_INVERT(LED_THREE);
break;
}
default:
{
p_response->header.code = COAP_CODE_400_BAD_REQUEST;
break;
}
}
break;
}
default:
{
p_response->header.code = COAP_CODE_405_METHOD_NOT_ALLOWED;
break;
}
}
uint32_t msg_handle;
err_code = coap_message_send(&msg_handle, p_response);
APP_ERROR_CHECK(err_code);
err_code = coap_message_delete(p_response);
APP_ERROR_CHECK(err_code);
if (p_request->header.code == COAP_CODE_PUT)
{
notify_all_led3_subscribers(COAP_TYPE_NON);
}
}