coap_status_t handle_observe_request(lwm2m_context_t * contextP,
lwm2m_uri_t * uriP,
uint8_t * fromAddr,
size_t fromAddrLen,
coap_packet_t * message,
coap_packet_t * response)
{
lwm2m_observed_t * observedP;
lwm2m_watcher_t * watcherP;
lwm2m_server_t * serverP;
LOG("handle_observe_request()\r\n");
if (!LWM2M_URI_IS_SET_INSTANCE(uriP) && LWM2M_URI_IS_SET_RESOURCE(uriP)) return COAP_400_BAD_REQUEST;
if (message->token_len == 0) return COAP_400_BAD_REQUEST;
serverP = prv_findServer(contextP, fromAddr, fromAddrLen);
if (serverP == NULL || serverP->status != STATE_REGISTERED) return COAP_401_UNAUTHORIZED;
observedP = prv_findObserved(contextP, uriP);
if (observedP == NULL)
{
observedP = (lwm2m_observed_t *)lwm2m_malloc(sizeof(lwm2m_observed_t));
if (observedP == NULL) return COAP_500_INTERNAL_SERVER_ERROR;
memset(observedP, 0, sizeof(lwm2m_observed_t));
memcpy(&(observedP->uri), uriP, sizeof(lwm2m_uri_t));
observedP->next = contextP->observedList;
contextP->observedList = observedP;
}
watcherP = prv_findWatcher(observedP, serverP);
if (watcherP == NULL)
{
watcherP = (lwm2m_watcher_t *)lwm2m_malloc(sizeof(lwm2m_watcher_t));
if (watcherP == NULL) return COAP_500_INTERNAL_SERVER_ERROR;
memset(watcherP, 0, sizeof(lwm2m_watcher_t));
watcherP->server = serverP;
watcherP->tokenLen = message->token_len;
memcpy(watcherP->token, message->token, message->token_len);
watcherP->next = observedP->watcherList;
observedP->watcherList = watcherP;
}
coap_set_header_observe(response, watcherP->counter++);
return COAP_205_CONTENT;
}
coap_status_t handle_dm_request(lwm2m_context_t * contextP,
lwm2m_uri_t * uriP,
void * fromSessionH,
coap_packet_t * message,
coap_packet_t * response)
{
coap_status_t result;
lwm2m_server_t * serverP = NULL;
lwm2m_media_type_t format;
#ifdef LWM2M_BOOTSTRAP
lwm2m_server_t * bsServerP = NULL;
#endif
format = prv_convertMediaType(message->content_type);
serverP = prv_findServer(contextP, fromSessionH);
if (NULL == serverP)
{
#ifdef LWM2M_BOOTSTRAP
bsServerP = utils_findBootstrapServer(contextP, fromSessionH);
if (NULL == bsServerP)
{
// No server found
return COAP_IGNORE;
}
#else
return COAP_IGNORE;
#endif
}
#ifdef LWM2M_BOOTSTRAP
if (contextP->bsState != BOOTSTRAP_PENDING)
{
if (NULL != bsServerP)
{
// server initiated bootstrap?
// currently not implemented.
return NOT_IMPLEMENTED_5_01;
}
if ( serverP->status != STATE_REGISTERED &&
serverP->status != STATE_REG_UPDATE_PENDING)
{
return COAP_IGNORE;
}
}
else
{
if (NULL != serverP)
{
// Request form management server during bootstrap.
return UNAUTHORIZED_4_01;
}
}
#endif
switch (message->code)
{
case COAP_GET:
{
uint8_t * buffer = NULL;
size_t length = 0;
result = object_read(contextP, uriP, &format, &buffer, &length);
if (COAP_205_CONTENT == result)
{
if (IS_OPTION(message, COAP_OPTION_OBSERVE))
{
result = handle_observe_request(contextP, uriP, serverP, message, response);
}
if (COAP_205_CONTENT == result)
{
coap_set_header_content_type(response, format);
coap_set_payload(response, buffer, length);
// lwm2m_handle_packet will free buffer
}
else
{
lwm2m_free(buffer);
}
}
}
break;
case COAP_POST:
{
#ifdef LWM2M_BOOTSTRAP
/* no POST during bootstrap */
if (contextP->bsState == BOOTSTRAP_PENDING) return METHOD_NOT_ALLOWED_4_05;
#endif
if (!LWM2M_URI_IS_SET_INSTANCE(uriP))
{
lwm2m_media_type_t format;
format = prv_convertMediaType(message->content_type);
result = object_create(contextP, uriP, format, message->payload, message->payload_len);
if (result == COAP_201_CREATED)
{
//longest uri is /65535/65535 = 12 + 1 (null) chars
char location_path[13] = "";
//instanceId expected
if ((uriP->flag & LWM2M_URI_FLAG_INSTANCE_ID) == 0)
{
result = COAP_500_INTERNAL_SERVER_ERROR;
break;
}
if (sprintf(location_path, "/%d/%d", uriP->objectId, uriP->instanceId) < 0)
{
result = COAP_500_INTERNAL_SERVER_ERROR;
break;
}
coap_set_header_location_path(response, location_path);
}
}
else if (!LWM2M_URI_IS_SET_RESOURCE(uriP))
{
if (object_isInstanceNew(contextP, uriP->objectId, uriP->instanceId))
{
result = object_create(contextP, uriP, format, message->payload, message->payload_len);
}
else
{
result = object_write(contextP, uriP, format, message->payload, message->payload_len);
}
}
else
{
result = object_execute(contextP, uriP, message->payload, message->payload_len);
}
}
break;
case COAP_PUT:
{
if (LWM2M_URI_IS_SET_INSTANCE(uriP))
{
#ifdef LWM2M_BOOTSTRAP
if (contextP->bsState == BOOTSTRAP_PENDING && object_isInstanceNew(contextP, uriP->objectId, uriP->instanceId))
{
result = object_create(contextP, uriP, format, message->payload, message->payload_len);
if (COAP_201_CREATED == result)
{
result = COAP_204_CHANGED;
}
}
else
#endif
{
result = object_write(contextP, uriP, format, message->payload, message->payload_len);
}
}
else
{
result = BAD_REQUEST_4_00;
}
}
break;
case COAP_DELETE:
{
if (LWM2M_URI_IS_SET_INSTANCE(uriP) && !LWM2M_URI_IS_SET_RESOURCE(uriP))
{
result = object_delete(contextP, uriP);
}
else
{
result = BAD_REQUEST_4_00;
}
}
break;
default:
result = BAD_REQUEST_4_00;
break;
}
return result;
}
