Hello every one !
I am trying to use the GET_CODE to ask information from one of my device.
I have a ressource called RES1 to which I send a GET request with the following fonction.
void thread_coap_TRYGET_request_send(otInstance * p_instance, otIp6Address* add){
otError error = OT_ERROR_NONE;
otMessage * p_request;
otMessageInfo message_info;
otCoapHeader header;
do
{
otCoapHeaderInit(&header, OT_COAP_TYPE_NON_CONFIRMABLE, OT_COAP_CODE_GET);
otCoapHeaderGenerateToken(&header, 2);
UNUSED_VARIABLE(otCoapHeaderAppendUriPathOptions(&header, "RES1"));
UNUSED_VARIABLE(otCoapHeaderSetPayloadMarker(&header));
memset(&message_info, 0, sizeof(message_info));
message_info.mInterfaceId = OT_NETIF_INTERFACE_ID_THREAD;
message_info.mPeerPort = OT_DEFAULT_COAP_PORT;
memcpy(&message_info.mPeerAddr, add, sizeof(otIp6Address));
p_request = otCoapNewMessage(p_instance, &header);
if (p_request == NULL)
{
break;
}
error = otCoapSendRequest(p_instance, p_request, &message_info,thread_coap_TRYGET_response_handler, p_instance);
if (error == OT_ERROR_NONE){
LEDS_INVERT(BSP_LED_2_MASK);
}
} while (false);
if (error != OT_ERROR_NONE && p_request != NULL)
{
NRF_LOG_INFO("Failed to send CoAP Request: %d\r\n", error);
otMessageFree(p_request);
}
}
First of all : could any one tell me if a CONFIRMABLE header type necesseraly needs an acknoledge answer ? if not I can use it as a trick to repeat the request until I get a response.
Also I found out if there is no data append (otMessageAppend) into the message, I got an OT_ERROR_PARSE.
So to get a message send, I had to add to have a OT_ERROR_NONE
uint8_t data = 0; error = otMessageAppend(p_request, &data, sizeof(data));
The requested device executes the following code (I would like to send back data2send)
otError error = OT_ERROR_NO_BUFS;
otCoapHeader header;
otMessage * p_response;
uint8_t data2send = 0;
do
{
//otCoapHeaderInit(&header, OT_COAP_TYPE_ACKNOWLEDGMENT, OT_COAP_CODE_CHANGED);
otCoapHeaderInit(&header, OT_COAP_TYPE_NON_CONFIRMABLE , OT_COAP_CODE_CONTENT);
otCoapHeaderSetMessageId(&header, otCoapHeaderGetMessageId(p_request_header));
otCoapHeaderSetToken(&header,
otCoapHeaderGetToken(p_request_header),
otCoapHeaderGetTokenLength(p_request_header));
p_response = otCoapNewMessage(p_context, &header);
if (p_response == NULL)
{
break;
}
error = otMessageAppend(p_response, &data2send, sizeof(uint8_t));
error = otCoapSendResponse(p_context, p_response, p_message_info);
} while (false);
if ((error != OT_ERROR_NONE) && (p_response != NULL))
{
otMessageFree(p_response);
}
Again, the message is not sent and I have an OT_ERROR_PARSE.
Is otCoapSendRequest made only for TYPE_ACKNOLEDGMENT ?
I replaced the otCoapSendRequest by a otCoapSendRequest(p_context, p_response, p_message_info, NULL, NULL) but I got the same issue.
I tried a few things, the only times I get into this thread_coap_TRYGET_response_handler is when I used
CONFIRMABLE request, and TYPE_ACKNOLEDGMENT and CODE_CHANGED into the response.
But in the TYPE_ACKNOLEDGMENT case if I put data with otMessageAppend, the response is not sent (OT_ERROR_PARSE)
Would you have any idea of what is wrong with my code ?
void thread_coap_TRYGET_request_send(otInstance * p_instance, otIp6Address* add){
otError error = OT_ERROR_NONE;
otMessage * p_request;
otMessageInfo message_info;
otCoapHeader header;
do
{
otCoapHeaderInit(&header, OT_COAP_TYPE_NON_CONFIRMABLE, OT_COAP_CODE_GET);
otCoapHeaderGenerateToken(&header, 2);
UNUSED_VARIABLE(otCoapHeaderAppendUriPathOptions(&header, "RES1"));
UNUSED_VARIABLE(otCoapHeaderSetPayloadMarker(&header));
memset(&message_info, 0, sizeof(message_info));
message_info.mInterfaceId = OT_NETIF_INTERFACE_ID_THREAD;
message_info.mPeerPort = OT_DEFAULT_COAP_PORT;
memcpy(&message_info.mPeerAddr, add, sizeof(otIp6Address));
p_request = otCoapNewMessage(p_instance, &header);
if (p_request == NULL)
{
break;
}
error = otCoapSendRequest(p_instance, p_request, &message_info,thread_coap_TRYGET_response_handler, p_instance);
if (error == OT_ERROR_NONE){
LEDS_INVERT(BSP_LED_2_MASK);
}
} while (false);
if (error != OT_ERROR_NONE && p_request != NULL)
{
NRF_LOG_INFO("Failed to send CoAP Request: %d\r\n", error);
otMessageFree(p_request);
}
}
