2017-10-08 16:46:14 +02:00

657 lines
16 KiB
C

/*******************************************************************************
*
* Copyright (c) 2013, 2014 Intel Corporation and others.
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* and Eclipse Distribution License v1.0 which accompany this distribution.
*
* The Eclipse Public License is available at
* http://www.eclipse.org/legal/epl-v10.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
* Fabien Fleutot - Please refer to git log
* Bosch Software Innovations GmbH - Please refer to git log
*
*******************************************************************************/
#include "internals.h"
#include <float.h>
#define _PRV_STR_LENGTH 32
// dataP array length is assumed to be 1.
static int prv_textSerialize(lwm2m_data_t * dataP,
uint8_t ** bufferP)
{
size_t res;
switch (dataP->type)
{
case LWM2M_TYPE_STRING:
*bufferP = (uint8_t *)lwm2m_malloc(dataP->value.asBuffer.length);
if (*bufferP == NULL) return 0;
memcpy(*bufferP, dataP->value.asBuffer.buffer, dataP->value.asBuffer.length);
return (int)dataP->value.asBuffer.length;
case LWM2M_TYPE_INTEGER:
{
uint8_t intString[_PRV_STR_LENGTH];
res = utils_intToText(dataP->value.asInteger, intString, _PRV_STR_LENGTH);
if (res == 0) return -1;
*bufferP = (uint8_t *)lwm2m_malloc(res);
if (NULL == *bufferP) return -1;
memcpy(*bufferP, intString, res);
return (int)res;
}
case LWM2M_TYPE_FLOAT:
{
uint8_t floatString[_PRV_STR_LENGTH * 2];
res = utils_floatToText(dataP->value.asFloat, floatString, _PRV_STR_LENGTH * 2);
if (res == 0) return -1;
*bufferP = (uint8_t *)lwm2m_malloc(res);
if (NULL == *bufferP) return -1;
memcpy(*bufferP, floatString, res);
return (int)res;
}
case LWM2M_TYPE_BOOLEAN:
*bufferP = (uint8_t *)lwm2m_malloc(1);
if (NULL == *bufferP) return -1;
*bufferP[0] = dataP->value.asBoolean ? '1' : '0';
return 1;
case LWM2M_TYPE_OBJECT_LINK:
{
char stringBuffer[11];
size_t length;
length = utils_intToText(dataP->value.asObjLink.objectId, (uint8_t*)stringBuffer, 5);
if (length == 0) return -1;
stringBuffer[5] = ':';
res = length + 1;
length = utils_intToText(dataP->value.asObjLink.objectInstanceId, (uint8_t*)stringBuffer + res, 5);
if (length == 0) return -1;
res += length;
*bufferP = (uint8_t *)lwm2m_malloc(res);
if (*bufferP == NULL) return -1;
memcpy(*bufferP, stringBuffer, res);
return res;
}
case LWM2M_TYPE_OPAQUE:
{
size_t length;
length = utils_base64GetSize(dataP->value.asBuffer.length);
*bufferP = (uint8_t *)lwm2m_malloc(length);
if (*bufferP == NULL) return 0;
length = utils_base64Encode(dataP->value.asBuffer.buffer, dataP->value.asBuffer.length, *bufferP, length);
if (length == 0)
{
lwm2m_free(*bufferP);
*bufferP = NULL;
return 0;
}
return (int)length;
}
case LWM2M_TYPE_UNDEFINED:
default:
return -1;
}
}
static int prv_setBuffer(lwm2m_data_t * dataP,
uint8_t * buffer,
size_t bufferLen)
{
dataP->value.asBuffer.buffer = (uint8_t *)lwm2m_malloc(bufferLen);
if (dataP->value.asBuffer.buffer == NULL)
{
return 0;
}
dataP->value.asBuffer.length = bufferLen;
memcpy(dataP->value.asBuffer.buffer, buffer, bufferLen);
return 1;
}
lwm2m_data_t * lwm2m_data_new(int size)
{
lwm2m_data_t * dataP;
LOG_ARG("size: %d", size);
if (size <= 0) return NULL;
dataP = (lwm2m_data_t *)lwm2m_malloc(size * sizeof(lwm2m_data_t));
if (dataP != NULL)
{
memset(dataP, 0, size * sizeof(lwm2m_data_t));
}
return dataP;
}
void lwm2m_data_free(int size,
lwm2m_data_t * dataP)
{
int i;
LOG_ARG("size: %d", size);
if (size == 0 || dataP == NULL) return;
for (i = 0; i < size; i++)
{
switch (dataP[i].type)
{
case LWM2M_TYPE_MULTIPLE_RESOURCE:
case LWM2M_TYPE_OBJECT_INSTANCE:
case LWM2M_TYPE_OBJECT:
lwm2m_data_free(dataP[i].value.asChildren.count, dataP[i].value.asChildren.array);
break;
case LWM2M_TYPE_STRING:
case LWM2M_TYPE_OPAQUE:
if (dataP[i].value.asBuffer.buffer != NULL)
{
lwm2m_free(dataP[i].value.asBuffer.buffer);
}
default:
// do nothing
break;
}
}
lwm2m_free(dataP);
}
void lwm2m_data_encode_string(const char * string,
lwm2m_data_t * dataP)
{
size_t len;
int res;
LOG_ARG("\"%s\"", string);
if (string == NULL)
{
len = 0;
}
else
{
for (len = 0; string[len] != 0; len++);
}
if (len == 0)
{
dataP->value.asBuffer.length = 0;
dataP->value.asBuffer.buffer = NULL;
res = 1;
}
else
{
res = prv_setBuffer(dataP, (uint8_t *)string, len);
}
if (res == 1)
{
dataP->type = LWM2M_TYPE_STRING;
}
else
{
dataP->type = LWM2M_TYPE_UNDEFINED;
}
}
void lwm2m_data_encode_opaque(uint8_t * buffer,
size_t length,
lwm2m_data_t * dataP)
{
int res;
LOG_ARG("length: %d", length);
if (length == 0)
{
dataP->value.asBuffer.length = 0;
dataP->value.asBuffer.buffer = NULL;
res = 1;
}
else
{
res = prv_setBuffer(dataP, buffer, length);
}
if (res == 1)
{
dataP->type = LWM2M_TYPE_OPAQUE;
}
else
{
dataP->type = LWM2M_TYPE_UNDEFINED;
}
}
void lwm2m_data_encode_nstring(const char * string,
size_t length,
lwm2m_data_t * dataP)
{
LOG_ARG("length: %d, string: \"%s\"", length, string);
lwm2m_data_encode_opaque((uint8_t *)string, length, dataP);
if (dataP->type == LWM2M_TYPE_OPAQUE)
{
dataP->type = LWM2M_TYPE_STRING;
}
}
void lwm2m_data_encode_int(int64_t value,
lwm2m_data_t * dataP)
{
LOG_ARG("value: %" PRId64 "", value);
dataP->type = LWM2M_TYPE_INTEGER;
dataP->value.asInteger = value;
}
int lwm2m_data_decode_int(const lwm2m_data_t * dataP,
int64_t * valueP)
{
int result;
LOG("Entering");
switch (dataP->type)
{
case LWM2M_TYPE_INTEGER:
*valueP = dataP->value.asInteger;
result = 1;
break;
case LWM2M_TYPE_STRING:
result = utils_textToInt(dataP->value.asBuffer.buffer, dataP->value.asBuffer.length, valueP);
break;
case LWM2M_TYPE_OPAQUE:
switch (dataP->value.asBuffer.length)
{
case 1:
*valueP = (int8_t)dataP->value.asBuffer.buffer[0];
result = 1;
break;
case 2:
{
int16_t value;
utils_copyValue(&value, dataP->value.asBuffer.buffer, dataP->value.asBuffer.length);
*valueP = value;
result = 1;
break;
}
case 4:
{
int32_t value;
utils_copyValue(&value, dataP->value.asBuffer.buffer, dataP->value.asBuffer.length);
*valueP = value;
result = 1;
break;
}
case 8:
utils_copyValue(valueP, dataP->value.asBuffer.buffer, dataP->value.asBuffer.length);
result = 1;
break;
default:
result = 0;
}
break;
default:
return 0;
}
LOG_ARG("result: %d, value: %" PRId64, result, *valueP);
return result;
}
void lwm2m_data_encode_float(double value,
lwm2m_data_t * dataP)
{
LOG_ARG("value: %f", value);
dataP->type = LWM2M_TYPE_FLOAT;
dataP->value.asFloat = value;
}
int lwm2m_data_decode_float(const lwm2m_data_t * dataP,
double * valueP)
{
int result;
LOG("Entering");
switch (dataP->type)
{
case LWM2M_TYPE_FLOAT:
*valueP = dataP->value.asFloat;
result = 1;
break;
case LWM2M_TYPE_INTEGER:
*valueP = (double)dataP->value.asInteger;
result = 1;
break;
case LWM2M_TYPE_STRING:
result = utils_textToFloat(dataP->value.asBuffer.buffer, dataP->value.asBuffer.length, valueP);
break;
case LWM2M_TYPE_OPAQUE:
switch (dataP->value.asBuffer.length)
{
case 4:
{
float temp;
utils_copyValue(&temp, dataP->value.asBuffer.buffer, dataP->value.asBuffer.length);
*valueP = temp;
result = 1;
}
break;
case 8:
utils_copyValue(valueP, dataP->value.asBuffer.buffer, dataP->value.asBuffer.length);
result = 1;
break;
default:
result = 0;
}
break;
default:
result = 0;
}
LOG_ARG("result: %d, value: %f", result, *valueP);
return result;
}
void lwm2m_data_encode_bool(bool value,
lwm2m_data_t * dataP)
{
LOG_ARG("value: %s", value?"true":"false");
dataP->type = LWM2M_TYPE_BOOLEAN;
dataP->value.asBoolean = value;
}
int lwm2m_data_decode_bool(const lwm2m_data_t * dataP,
bool * valueP)
{
int result;
LOG("Entering");
switch (dataP->type)
{
case LWM2M_TYPE_BOOLEAN:
*valueP = dataP->value.asBoolean;
result = 1;
break;
case LWM2M_TYPE_STRING:
if (dataP->value.asBuffer.length != 1) return 0;
switch (dataP->value.asBuffer.buffer[0])
{
case '0':
*valueP = false;
result = 1;
break;
case '1':
*valueP = true;
result = 1;
break;
default:
result = 0;
break;
}
break;
case LWM2M_TYPE_OPAQUE:
if (dataP->value.asBuffer.length != 1) return 0;
switch (dataP->value.asBuffer.buffer[0])
{
case 0:
*valueP = false;
result = 1;
break;
case 1:
*valueP = true;
result = 1;
break;
default:
result = 0;
break;
}
break;
default:
result = 0;
break;
}
LOG_ARG("result: %d, value: %s", result, *valueP ? "true" : "false");
return result;
}
void lwm2m_data_encode_objlink(uint16_t objectId,
uint16_t objectInstanceId,
lwm2m_data_t * dataP)
{
LOG_ARG("value: %d/%d", objectId, objectInstanceId);
dataP->type = LWM2M_TYPE_OBJECT_LINK;
dataP->value.asObjLink.objectId = objectId;
dataP->value.asObjLink.objectInstanceId = objectInstanceId;
}
void lwm2m_data_include(lwm2m_data_t * subDataP,
size_t count,
lwm2m_data_t * dataP)
{
LOG_ARG("count: %d", count);
if (subDataP == NULL || count == 0) return;
switch (subDataP[0].type)
{
case LWM2M_TYPE_STRING:
case LWM2M_TYPE_OPAQUE:
case LWM2M_TYPE_INTEGER:
case LWM2M_TYPE_FLOAT:
case LWM2M_TYPE_BOOLEAN:
case LWM2M_TYPE_OBJECT_LINK:
case LWM2M_TYPE_MULTIPLE_RESOURCE:
dataP->type = LWM2M_TYPE_OBJECT_INSTANCE;
break;
case LWM2M_TYPE_OBJECT_INSTANCE:
dataP->type = LWM2M_TYPE_OBJECT;
break;
default:
return;
}
dataP->value.asChildren.count = count;
dataP->value.asChildren.array = subDataP;
}
void lwm2m_data_encode_instances(lwm2m_data_t * subDataP,
size_t count,
lwm2m_data_t * dataP)
{
LOG_ARG("count: %d", count);
lwm2m_data_include(subDataP, count, dataP);
dataP->type = LWM2M_TYPE_MULTIPLE_RESOURCE;
}
int lwm2m_data_parse(lwm2m_uri_t * uriP,
uint8_t * buffer,
size_t bufferLen,
lwm2m_media_type_t format,
lwm2m_data_t ** dataP)
{
int res;
LOG_ARG("format: %s, bufferLen: %d", STR_MEDIA_TYPE(format), bufferLen);
LOG_URI(uriP);
switch (format)
{
case LWM2M_CONTENT_TEXT:
if (!LWM2M_URI_IS_SET_RESOURCE(uriP)) return 0;
*dataP = lwm2m_data_new(1);
if (*dataP == NULL) return 0;
(*dataP)->id = uriP->resourceId;
(*dataP)->type = LWM2M_TYPE_STRING;
res = prv_setBuffer(*dataP, buffer, bufferLen);
if (res == 0)
{
lwm2m_data_free(1, *dataP);
*dataP = NULL;
}
return res;
case LWM2M_CONTENT_OPAQUE:
if (!LWM2M_URI_IS_SET_RESOURCE(uriP)) return 0;
*dataP = lwm2m_data_new(1);
if (*dataP == NULL) return 0;
(*dataP)->id = uriP->resourceId;
(*dataP)->type = LWM2M_TYPE_OPAQUE;
res = prv_setBuffer(*dataP, buffer, bufferLen);
if (res == 0)
{
lwm2m_data_free(1, *dataP);
*dataP = NULL;
}
return res;
#ifdef LWM2M_OLD_CONTENT_FORMAT_SUPPORT
case LWM2M_CONTENT_TLV_OLD:
#endif
case LWM2M_CONTENT_TLV:
return tlv_parse(buffer, bufferLen, dataP);
#ifdef LWM2M_SUPPORT_JSON
#ifdef LWM2M_OLD_CONTENT_FORMAT_SUPPORT
case LWM2M_CONTENT_JSON_OLD:
#endif
case LWM2M_CONTENT_JSON:
return json_parse(uriP, buffer, bufferLen, dataP);
#endif
default:
return 0;
}
}
int lwm2m_data_serialize(lwm2m_uri_t * uriP,
int size,
lwm2m_data_t * dataP,
lwm2m_media_type_t * formatP,
uint8_t ** bufferP)
{
LOG_URI(uriP);
LOG_ARG("size: %d, formatP: %s", size, STR_MEDIA_TYPE(*formatP));
// Check format
if (*formatP == LWM2M_CONTENT_TEXT
|| *formatP == LWM2M_CONTENT_OPAQUE)
{
if (size != 1
|| (uriP != NULL && !LWM2M_URI_IS_SET_RESOURCE(uriP))
|| dataP->type == LWM2M_TYPE_OBJECT
|| dataP->type == LWM2M_TYPE_OBJECT_INSTANCE
|| dataP->type == LWM2M_TYPE_MULTIPLE_RESOURCE)
{
#ifdef LWM2M_SUPPORT_JSON
*formatP = LWM2M_CONTENT_JSON;
#else
*formatP = LWM2M_CONTENT_TLV;
#endif
}
}
if (*formatP == LWM2M_CONTENT_OPAQUE
&& dataP->type != LWM2M_TYPE_OPAQUE)
{
LOG("Opaque format is reserved to opaque resources.");
return -1;
}
LOG_ARG("Final format: %s", STR_MEDIA_TYPE(*formatP));
switch (*formatP)
{
case LWM2M_CONTENT_TEXT:
return prv_textSerialize(dataP, bufferP);
case LWM2M_CONTENT_OPAQUE:
*bufferP = (uint8_t *)lwm2m_malloc(dataP->value.asBuffer.length);
if (*bufferP == NULL) return -1;
memcpy(*bufferP, dataP->value.asBuffer.buffer, dataP->value.asBuffer.length);
return (int)dataP->value.asBuffer.length;
case LWM2M_CONTENT_TLV:
case LWM2M_CONTENT_TLV_OLD:
{
bool isResourceInstance;
if (uriP != NULL && LWM2M_URI_IS_SET_RESOURCE(uriP)
&& (size != 1 || dataP->id != uriP->resourceId))
{
isResourceInstance = true;
}
else
{
isResourceInstance = false;
}
return tlv_serialize(isResourceInstance, size, dataP, bufferP);
}
#ifdef LWM2M_CLIENT_MODE
case LWM2M_CONTENT_LINK:
return discover_serialize(NULL, uriP, NULL, size, dataP, bufferP);
#endif
#ifdef LWM2M_SUPPORT_JSON
case LWM2M_CONTENT_JSON:
case LWM2M_CONTENT_JSON_OLD:
return json_serialize(uriP, size, dataP, bufferP);
#endif
default:
return -1;
}
}