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senml_common.c
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senml_common.c
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/*******************************************************************************
*
* Copyright (c) 2015 Intel Corporation and others.
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v2.0
* and Eclipse Distribution License v1.0 which accompany this distribution.
*
* The Eclipse Public License is available at
* http://www.eclipse.org/legal/epl-v20.html
* The Eclipse Distribution License is available at
* http://www.eclipse.org/org/documents/edl-v10.php.
*
* Contributors:
* David Navarro, Intel Corporation - initial API and implementation
* Scott Bertin, AMETEK, Inc. - Please refer to git log
*
*******************************************************************************/
#include "internals.h"
#if defined(LWM2M_SUPPORT_JSON) || defined(LWM2M_SUPPORT_SENML_JSON) || defined(LWM2M_SUPPORT_SENML_CBOR)
static int prv_convertRecord(const senml_record_t *recordArray, int count, lwm2m_data_t **dataP,
senml_convertValue convertValue) {
int index;
int freeIndex;
lwm2m_data_t *rootP;
rootP = lwm2m_data_new(count);
if (NULL == rootP) {
*dataP = NULL;
return -1;
}
freeIndex = 0;
for (index = 0; index < count; index++) {
lwm2m_data_t *targetP;
int i;
targetP = senml_findDataItem(rootP, count, recordArray[index].ids[0]);
if (targetP == NULL) {
targetP = rootP + freeIndex;
freeIndex++;
targetP->id = recordArray[index].ids[0];
if (targetP->id != LWM2M_MAX_ID) {
targetP->type = LWM2M_TYPE_OBJECT;
} else {
targetP->type = LWM2M_TYPE_UNDEFINED;
}
}
if (recordArray[index].ids[1] != LWM2M_MAX_ID) {
lwm2m_data_t *parentP;
uri_depth_t level;
parentP = targetP;
level = URI_DEPTH_OBJECT_INSTANCE;
for (i = 1; i <= 2; i++) {
if (recordArray[index].ids[i] == LWM2M_MAX_ID)
break;
targetP = senml_findDataItem(parentP->value.asChildren.array, parentP->value.asChildren.count,
recordArray[index].ids[i]);
if (targetP == NULL) {
targetP = senml_extendData(parentP, utils_depthToDatatype(level), recordArray[index].ids[i]);
if (targetP == NULL)
goto error;
}
level = senml_decreaseLevel(level);
parentP = targetP;
}
if (recordArray[index].ids[3] != LWM2M_MAX_ID) {
targetP->type = LWM2M_TYPE_MULTIPLE_RESOURCE;
targetP = senml_extendData(targetP, LWM2M_TYPE_UNDEFINED, recordArray[index].ids[3]);
if (targetP == NULL)
goto error;
}
}
if (!convertValue(recordArray + index, targetP))
goto error;
}
if (freeIndex < count) {
*dataP = lwm2m_data_new(freeIndex);
if (*dataP == NULL)
goto error;
memcpy(*dataP, rootP, freeIndex * sizeof(lwm2m_data_t));
lwm2m_free(rootP); /* do not use lwm2m_data_free() to keep pointed values */
} else {
*dataP = rootP;
}
return freeIndex;
error:
lwm2m_data_free(count, rootP);
*dataP = NULL;
return -1;
}
int senml_convert_records(const lwm2m_uri_t *uriP, senml_record_t *recordArray, int numRecords,
senml_convertValue convertValue, lwm2m_data_t **dataP) {
lwm2m_data_t *resultP;
lwm2m_data_t *parsedP = NULL;
int size;
int count;
count = prv_convertRecord(recordArray, numRecords, &parsedP, convertValue);
lwm2m_free(recordArray);
if (count > 0 && uriP != NULL && LWM2M_URI_IS_SET_OBJECT(uriP)) {
if (parsedP->type != LWM2M_TYPE_OBJECT)
goto error;
if (parsedP->id != uriP->objectId)
goto error;
if (!LWM2M_URI_IS_SET_INSTANCE(uriP)) {
size = parsedP->value.asChildren.count;
resultP = parsedP->value.asChildren.array;
} else {
int i;
resultP = NULL;
/* be permissive and allow full object when requesting for a single instance */
for (i = 0; i < (int)parsedP->value.asChildren.count && resultP == NULL; i++) {
lwm2m_data_t *targetP;
targetP = parsedP->value.asChildren.array + i;
if (targetP->id == uriP->instanceId) {
resultP = targetP->value.asChildren.array;
size = targetP->value.asChildren.count;
}
}
if (resultP == NULL)
goto error;
if (LWM2M_URI_IS_SET_RESOURCE(uriP)) {
lwm2m_data_t *resP;
resP = NULL;
for (i = 0; i < size && resP == NULL; i++) {
lwm2m_data_t *targetP;
targetP = resultP + i;
if (targetP->id == uriP->resourceId) {
#ifndef LWM2M_VERSION_1_0
if (targetP->type == LWM2M_TYPE_MULTIPLE_RESOURCE && LWM2M_URI_IS_SET_RESOURCE_INSTANCE(uriP)) {
resP = targetP->value.asChildren.array;
size = targetP->value.asChildren.count;
} else
#endif
{
size = senml_dataStrip(1, targetP, &resP);
if (size <= 0)
goto error;
lwm2m_data_free(count, parsedP);
parsedP = NULL;
}
}
}
if (resP == NULL)
goto error;
resultP = resP;
}
#ifndef LWM2M_VERSION_1_0
if (LWM2M_URI_IS_SET_RESOURCE_INSTANCE(uriP)) {
lwm2m_data_t *resP;
resP = NULL;
for (i = 0; i < size && resP == NULL; i++) {
lwm2m_data_t *targetP;
targetP = resultP + i;
if (targetP->id == uriP->resourceInstanceId) {
size = senml_dataStrip(1, targetP, &resP);
if (size <= 0)
goto error;
lwm2m_data_free(count, parsedP);
parsedP = NULL;
}
}
if (resP == NULL)
goto error;
resultP = resP;
}
#endif
}
} else {
resultP = parsedP;
size = count;
}
if (parsedP != NULL) {
lwm2m_data_t *tempP;
size = senml_dataStrip(size, resultP, &tempP);
if (size <= 0)
goto error;
lwm2m_data_free(count, parsedP);
resultP = tempP;
}
count = size;
*dataP = resultP;
return count;
error:
if (parsedP != NULL) {
lwm2m_data_free(count, parsedP);
parsedP = NULL;
}
return -1;
}
lwm2m_data_t *senml_extendData(lwm2m_data_t *parentP, lwm2m_data_type_t type, uint16_t id) {
int count = parentP->value.asChildren.count;
if (lwm2m_data_append_one(&count, &parentP->value.asChildren.array, type, id) != 0) {
parentP->value.asChildren.count = count;
return parentP->value.asChildren.array + count - 1;
}
return NULL;
}
int senml_dataStrip(int size, lwm2m_data_t *dataP, lwm2m_data_t **resultP) {
int i;
int j;
*resultP = lwm2m_data_new(size);
if (*resultP == NULL)
return -1;
j = 0;
for (i = 0; i < size; i++) {
memcpy((*resultP) + j, dataP + i, sizeof(lwm2m_data_t));
switch (dataP[i].type) {
case LWM2M_TYPE_OBJECT:
case LWM2M_TYPE_OBJECT_INSTANCE:
case LWM2M_TYPE_MULTIPLE_RESOURCE: {
if (dataP[i].value.asChildren.count != 0) {
int childLen;
childLen = senml_dataStrip(dataP[i].value.asChildren.count, dataP[i].value.asChildren.array,
&((*resultP)[j].value.asChildren.array));
if (childLen <= 0) {
/* skip this one */
j--;
} else {
(*resultP)[j].value.asChildren.count = childLen;
}
}
break;
}
case LWM2M_TYPE_STRING:
case LWM2M_TYPE_OPAQUE:
case LWM2M_TYPE_CORE_LINK:
dataP[i].value.asBuffer.length = 0;
dataP[i].value.asBuffer.buffer = NULL;
break;
default:
/* do nothing */
break;
}
j++;
}
return size;
}
lwm2m_data_t *senml_findDataItem(lwm2m_data_t *listP, size_t count, uint16_t id) {
size_t i;
// TODO: handle times
i = 0;
while (i < count) {
if (listP[i].type != LWM2M_TYPE_UNDEFINED && listP[i].id == id) {
return listP + i;
}
i++;
}
return NULL;
}
uri_depth_t senml_decreaseLevel(uri_depth_t level) {
switch (level) {
case URI_DEPTH_NONE:
return URI_DEPTH_OBJECT;
case URI_DEPTH_OBJECT:
return URI_DEPTH_OBJECT_INSTANCE;
case URI_DEPTH_OBJECT_INSTANCE:
return URI_DEPTH_RESOURCE;
case URI_DEPTH_RESOURCE:
return URI_DEPTH_RESOURCE_INSTANCE;
case URI_DEPTH_RESOURCE_INSTANCE:
return URI_DEPTH_RESOURCE_INSTANCE;
default:
return URI_DEPTH_RESOURCE;
}
}
static int prv_findAndCheckData(const lwm2m_uri_t *uriP, uri_depth_t desiredLevel, size_t size,
const lwm2m_data_t *tlvP, lwm2m_data_t **targetP, uri_depth_t *targetLevelP) {
size_t index;
int result;
if (size == 0)
return 0;
if (size > 1) {
if (tlvP[0].type == LWM2M_TYPE_OBJECT || tlvP[0].type == LWM2M_TYPE_OBJECT_INSTANCE) {
for (index = 0; index < size; index++) {
if (tlvP[index].type != tlvP[0].type) {
*targetP = NULL;
return -1;
}
}
} else {
for (index = 0; index < size; index++) {
if (tlvP[index].type == LWM2M_TYPE_OBJECT || tlvP[index].type == LWM2M_TYPE_OBJECT_INSTANCE) {
*targetP = NULL;
return -1;
}
}
}
}
*targetP = NULL;
result = -1;
switch (desiredLevel) {
case URI_DEPTH_OBJECT:
if (tlvP[0].type == LWM2M_TYPE_OBJECT) {
*targetP = (lwm2m_data_t *)tlvP;
*targetLevelP = URI_DEPTH_OBJECT;
result = (int)size;
}
break;
case URI_DEPTH_OBJECT_INSTANCE:
switch (tlvP[0].type) {
case LWM2M_TYPE_OBJECT:
for (index = 0; index < size; index++) {
if (tlvP[index].id == uriP->objectId) {
*targetLevelP = URI_DEPTH_OBJECT_INSTANCE;
return prv_findAndCheckData(uriP, desiredLevel, tlvP[index].value.asChildren.count,
tlvP[index].value.asChildren.array, targetP, targetLevelP);
}
}
break;
case LWM2M_TYPE_OBJECT_INSTANCE:
*targetP = (lwm2m_data_t *)tlvP;
result = (int)size;
break;
default:
break;
}
break;
case URI_DEPTH_RESOURCE:
switch (tlvP[0].type) {
case LWM2M_TYPE_OBJECT:
for (index = 0; index < size; index++) {
if (tlvP[index].id == uriP->objectId) {
*targetLevelP = URI_DEPTH_OBJECT_INSTANCE;
return prv_findAndCheckData(uriP, desiredLevel, tlvP[index].value.asChildren.count,
tlvP[index].value.asChildren.array, targetP, targetLevelP);
}
}
break;
case LWM2M_TYPE_OBJECT_INSTANCE:
for (index = 0; index < size; index++) {
if (tlvP[index].id == uriP->instanceId) {
*targetLevelP = URI_DEPTH_RESOURCE;
return prv_findAndCheckData(uriP, desiredLevel, tlvP[index].value.asChildren.count,
tlvP[index].value.asChildren.array, targetP, targetLevelP);
}
}
break;
default:
*targetP = (lwm2m_data_t *)tlvP;
result = (int)size;
break;
}
break;
case URI_DEPTH_RESOURCE_INSTANCE:
switch (tlvP[0].type) {
case LWM2M_TYPE_OBJECT:
for (index = 0; index < size; index++) {
if (tlvP[index].id == uriP->objectId) {
*targetLevelP = URI_DEPTH_OBJECT_INSTANCE;
return prv_findAndCheckData(uriP, desiredLevel, tlvP[index].value.asChildren.count,
tlvP[index].value.asChildren.array, targetP, targetLevelP);
}
}
break;
case LWM2M_TYPE_OBJECT_INSTANCE:
for (index = 0; index < size; index++) {
if (tlvP[index].id == uriP->instanceId) {
*targetLevelP = URI_DEPTH_RESOURCE;
return prv_findAndCheckData(uriP, desiredLevel, tlvP[index].value.asChildren.count,
tlvP[index].value.asChildren.array, targetP, targetLevelP);
}
}
break;
case LWM2M_TYPE_MULTIPLE_RESOURCE:
for (index = 0; index < size; index++) {
if (tlvP[index].id == uriP->resourceId) {
*targetLevelP = URI_DEPTH_RESOURCE_INSTANCE;
return prv_findAndCheckData(uriP, desiredLevel, tlvP[index].value.asChildren.count,
tlvP[index].value.asChildren.array, targetP, targetLevelP);
}
}
break;
default:
*targetP = (lwm2m_data_t *)tlvP;
result = (int)size;
break;
}
break;
default:
break;
}
return result;
}
int senml_findAndCheckData(const lwm2m_uri_t *uriP, uri_depth_t baseLevel, size_t size, const lwm2m_data_t *tlvP,
lwm2m_data_t **targetP, uri_depth_t *targetLevelP) {
uri_depth_t desiredLevel = senml_decreaseLevel(baseLevel);
if (baseLevel < URI_DEPTH_RESOURCE) {
*targetLevelP = desiredLevel;
} else {
*targetLevelP = baseLevel;
}
return prv_findAndCheckData(uriP, desiredLevel, size, tlvP, targetP, targetLevelP);
}
#endif