terence zhang
pick up wakaama files from https://github.com/eclipse/wakaama
Diff: core/discover.c
- Revision:
- 0:1fa43ab66921
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/core/discover.c Wed Apr 19 11:30:02 2017 +0000
@@ -0,0 +1,442 @@
+/*******************************************************************************
+*
+* 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 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
+*
+*******************************************************************************/
+
+
+#include "internals.h"
+
+#define PRV_LINK_BUFFER_SIZE 1024
+
+
+#define PRV_CONCAT_STR(buf, len, index, str, str_len) \
+ { \
+ if ((len)-(index) < (str_len)) return -1; \
+ memcpy((buf)+(index), (str), (str_len)); \
+ (index) += (str_len); \
+ }
+
+
+#ifdef LWM2M_CLIENT_MODE
+
+static lwm2m_attributes_t * prv_findAttributes(lwm2m_context_t * contextP,
+ lwm2m_uri_t * uriP,
+ lwm2m_server_t * serverP)
+{
+ lwm2m_observed_t * observedP;
+ lwm2m_watcher_t * watcherP;
+ lwm2m_attributes_t * paramP;
+
+ paramP = NULL;
+
+ if (contextP == NULL) return NULL;
+ if (serverP == NULL) return NULL;
+
+ observedP = observe_findByUri(contextP, uriP);
+ if (observedP == NULL || observedP->watcherList == NULL) return NULL;
+
+ for (watcherP = observedP->watcherList; watcherP != NULL; watcherP = watcherP->next)
+ {
+ if (watcherP->server == serverP)
+ {
+ paramP = watcherP->parameters;
+ }
+ }
+
+ return paramP;
+}
+
+static int prv_serializeAttributes(lwm2m_context_t * contextP,
+ lwm2m_uri_t * uriP,
+ lwm2m_server_t * serverP,
+ lwm2m_attributes_t * objectParamP,
+ uint8_t * buffer,
+ size_t uriLen,
+ size_t bufferLen)
+{
+ int head;
+ int res;
+ lwm2m_attributes_t * paramP;
+
+ head = 0;
+
+ paramP = prv_findAttributes(contextP, uriP, serverP);
+ if (paramP == NULL) paramP = objectParamP;
+
+ if (paramP != NULL)
+ {
+ head = uriLen;
+
+ if (paramP->toSet & LWM2M_ATTR_FLAG_MIN_PERIOD)
+ {
+ PRV_CONCAT_STR(buffer, bufferLen, head, LINK_ATTR_SEPARATOR, LINK_ATTR_SEPARATOR_SIZE);
+ PRV_CONCAT_STR(buffer, bufferLen, head, ATTR_MIN_PERIOD_STR, ATTR_MIN_PERIOD_LEN);
+
+ res = utils_intToText(paramP->minPeriod, buffer + head, bufferLen - head);
+ if (res <= 0) return -1;
+ head += res;
+ }
+ else if (objectParamP->toSet & LWM2M_ATTR_FLAG_MIN_PERIOD)
+ {
+ PRV_CONCAT_STR(buffer, bufferLen, head, LINK_ATTR_SEPARATOR, LINK_ATTR_SEPARATOR_SIZE);
+ PRV_CONCAT_STR(buffer, bufferLen, head, ATTR_MIN_PERIOD_STR, ATTR_MIN_PERIOD_LEN);
+
+ res = utils_intToText(objectParamP->minPeriod, buffer + head, bufferLen - head);
+ if (res <= 0) return -1;
+ head += res;
+ }
+
+ if (paramP->toSet & LWM2M_ATTR_FLAG_MAX_PERIOD)
+ {
+ PRV_CONCAT_STR(buffer, bufferLen, head, LINK_ATTR_SEPARATOR, LINK_ATTR_SEPARATOR_SIZE);
+ PRV_CONCAT_STR(buffer, bufferLen, head, ATTR_MAX_PERIOD_STR, ATTR_MAX_PERIOD_LEN);
+
+ res = utils_intToText(paramP->maxPeriod, buffer + head, bufferLen - head);
+ if (res <= 0) return -1;
+ head += res;
+ }
+ else if (objectParamP->toSet & LWM2M_ATTR_FLAG_MAX_PERIOD)
+ {
+ PRV_CONCAT_STR(buffer, bufferLen, head, LINK_ATTR_SEPARATOR, LINK_ATTR_SEPARATOR_SIZE);
+ PRV_CONCAT_STR(buffer, bufferLen, head, ATTR_MAX_PERIOD_STR, ATTR_MAX_PERIOD_LEN);
+
+ res = utils_intToText(objectParamP->maxPeriod, buffer + head, bufferLen - head);
+ if (res <= 0) return -1;
+ head += res;
+ }
+
+ if (paramP->toSet & LWM2M_ATTR_FLAG_GREATER_THAN)
+ {
+ PRV_CONCAT_STR(buffer, bufferLen, head, LINK_ATTR_SEPARATOR, LINK_ATTR_SEPARATOR_SIZE);
+ PRV_CONCAT_STR(buffer, bufferLen, head, ATTR_GREATER_THAN_STR, ATTR_GREATER_THAN_LEN);
+
+ res = utils_floatToText(paramP->greaterThan, buffer + head, bufferLen - head);
+ if (res <= 0) return -1;
+ head += res;
+ }
+ if (paramP->toSet & LWM2M_ATTR_FLAG_LESS_THAN)
+ {
+ PRV_CONCAT_STR(buffer, bufferLen, head, LINK_ATTR_SEPARATOR, LINK_ATTR_SEPARATOR_SIZE);
+ PRV_CONCAT_STR(buffer, bufferLen, head, ATTR_LESS_THAN_STR, ATTR_LESS_THAN_LEN);
+
+ res = utils_floatToText(paramP->lessThan, buffer + head, bufferLen - head);
+ if (res <= 0) return -1;
+ head += res;
+ }
+ if (paramP->toSet & LWM2M_ATTR_FLAG_STEP)
+ {
+ PRV_CONCAT_STR(buffer, bufferLen, head, LINK_ATTR_SEPARATOR, LINK_ATTR_SEPARATOR_SIZE);
+ PRV_CONCAT_STR(buffer, bufferLen, head, ATTR_STEP_STR, ATTR_STEP_LEN);
+
+ res = utils_floatToText(paramP->step, buffer + head, bufferLen - head);
+ if (res <= 0) return -1;
+ head += res;
+ }
+ PRV_CONCAT_STR(buffer, bufferLen, head, LINK_ITEM_ATTR_END, LINK_ITEM_ATTR_END_SIZE);
+ }
+
+ if (head > 0) head -= uriLen + 1;
+
+ return head;
+}
+
+static int prv_serializeLinkData(lwm2m_context_t * contextP,
+ lwm2m_data_t * tlvP,
+ lwm2m_server_t * serverP,
+ lwm2m_attributes_t * objectParamP,
+ lwm2m_uri_t * parentUriP,
+ uint8_t * parentUriStr,
+ size_t parentUriLen,
+ uint8_t * buffer,
+ size_t bufferLen)
+{
+ int head;
+ int res;
+ lwm2m_uri_t uri;
+
+ head = 0;
+
+ switch (tlvP->type)
+ {
+ case LWM2M_TYPE_UNDEFINED:
+ 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:
+ if (bufferLen < LINK_ITEM_START_SIZE) return -1;
+ memcpy(buffer + head, LINK_ITEM_START, LINK_ITEM_START_SIZE);
+ head = LINK_ITEM_START_SIZE;
+
+ if (parentUriLen > 0)
+ {
+ if (bufferLen - head < parentUriLen) return -1;
+ memcpy(buffer + head, parentUriStr, parentUriLen);
+ head += parentUriLen;
+ }
+
+ if (bufferLen - head < LINK_URI_SEPARATOR_SIZE) return -1;
+ memcpy(buffer + head, LINK_URI_SEPARATOR, LINK_URI_SEPARATOR_SIZE);
+ head += LINK_URI_SEPARATOR_SIZE;
+
+ res = utils_intToText(tlvP->id, buffer + head, bufferLen - head);
+ if (res <= 0) return -1;
+ head += res;
+
+ if (tlvP->type == LWM2M_TYPE_MULTIPLE_RESOURCE)
+ {
+ if (bufferLen - head < LINK_ITEM_DIM_START_SIZE) return -1;
+ memcpy(buffer + head, LINK_ITEM_DIM_START, LINK_ITEM_DIM_START_SIZE);
+ head += LINK_ITEM_DIM_START_SIZE;
+
+ res = utils_intToText(tlvP->value.asChildren.count, buffer + head, bufferLen - head);
+ if (res <= 0) return -1;
+ head += res;
+
+ if (bufferLen - head < LINK_ITEM_ATTR_END_SIZE) return -1;
+ memcpy(buffer + head, LINK_ITEM_ATTR_END, LINK_ITEM_ATTR_END_SIZE);
+ head += LINK_ITEM_ATTR_END_SIZE;
+ }
+ else
+ {
+ if (bufferLen - head < LINK_ITEM_END_SIZE) return -1;
+ memcpy(buffer + head, LINK_ITEM_END, LINK_ITEM_END_SIZE);
+ head += LINK_ITEM_END_SIZE;
+ }
+
+ if (serverP != NULL)
+ {
+ memcpy(&uri, parentUriP, sizeof(lwm2m_uri_t));
+ uri.resourceId = tlvP->id;
+ uri.flag |= LWM2M_URI_FLAG_RESOURCE_ID;
+ res = prv_serializeAttributes(contextP, &uri, serverP, objectParamP, buffer, head - 1, bufferLen);
+ if (res < 0) return -1; // careful, 0 is valid
+ if (res > 0) head += res;
+ }
+ break;
+
+ case LWM2M_TYPE_OBJECT_INSTANCE:
+ {
+ uint8_t uriStr[URI_MAX_STRING_LEN];
+ size_t uriLen;
+ size_t index;
+
+ if (parentUriLen > 0)
+ {
+ if (URI_MAX_STRING_LEN < parentUriLen) return -1;
+ memcpy(uriStr, parentUriStr, parentUriLen);
+ uriLen = parentUriLen;
+ }
+ else
+ {
+ uriLen = 0;
+ }
+
+ if (URI_MAX_STRING_LEN - uriLen < LINK_URI_SEPARATOR_SIZE) return -1;
+ memcpy(uriStr + uriLen, LINK_URI_SEPARATOR, LINK_URI_SEPARATOR_SIZE);
+ uriLen += LINK_URI_SEPARATOR_SIZE;
+
+ res = utils_intToText(tlvP->id, uriStr + uriLen, URI_MAX_STRING_LEN - uriLen);
+ if (res <= 0) return -1;
+ uriLen += res;
+
+ memcpy(&uri, parentUriP, sizeof(lwm2m_uri_t));
+ uri.instanceId = tlvP->id;
+ uri.flag |= LWM2M_URI_FLAG_INSTANCE_ID;
+
+ head = 0;
+ PRV_CONCAT_STR(buffer, bufferLen, head, LINK_ITEM_START, LINK_ITEM_START_SIZE);
+ PRV_CONCAT_STR(buffer, bufferLen, head, uriStr, uriLen);
+ PRV_CONCAT_STR(buffer, bufferLen, head, LINK_ITEM_END, LINK_ITEM_END_SIZE);
+ if (serverP != NULL)
+ {
+ res = prv_serializeAttributes(contextP, &uri, serverP, NULL, buffer, head - 1, bufferLen);
+ if (res < 0) return -1; // careful, 0 is valid
+ if (res == 0) head = 0; // rewind
+ else head += res;
+ }
+ for (index = 0; index < tlvP->value.asChildren.count; index++)
+ {
+ res = prv_serializeLinkData(contextP, tlvP->value.asChildren.array + index, serverP, objectParamP, &uri, uriStr, uriLen, buffer + head, bufferLen - head);
+ if (res < 0) return -1;
+ head += res;
+ }
+ }
+ break;
+
+ case LWM2M_TYPE_OBJECT:
+ default:
+ return -1;
+ }
+
+ return head;
+}
+
+int discover_serialize(lwm2m_context_t * contextP,
+ lwm2m_uri_t * uriP,
+ lwm2m_server_t * serverP,
+ int size,
+ lwm2m_data_t * dataP,
+ uint8_t ** bufferP)
+{
+ uint8_t bufferLink[PRV_LINK_BUFFER_SIZE];
+ uint8_t baseUriStr[URI_MAX_STRING_LEN];
+ int baseUriLen;
+ int index;
+ size_t head;
+ int res;
+ lwm2m_uri_t parentUri;
+ lwm2m_attributes_t * paramP;
+ lwm2m_attributes_t mergedParam;
+
+ LOG_ARG("size: %d", size);
+ LOG_URI(uriP);
+
+ head = 0;
+ memset(&parentUri, 0, sizeof(lwm2m_uri_t));
+ parentUri.objectId = uriP->objectId;
+ parentUri.flag = LWM2M_URI_FLAG_OBJECT_ID;
+
+ if (LWM2M_URI_IS_SET_RESOURCE(uriP))
+ {
+ lwm2m_uri_t tempUri;
+ lwm2m_attributes_t * objParamP;
+ lwm2m_attributes_t * instParamP;
+
+ memset(&parentUri, 0, sizeof(lwm2m_uri_t));
+ tempUri.objectId = uriP->objectId;
+ tempUri.flag = LWM2M_URI_FLAG_OBJECT_ID;
+
+ // get object level attributes
+ objParamP = prv_findAttributes(contextP, &tempUri, serverP);
+
+ // get object instance level attributes
+ tempUri.instanceId = uriP->instanceId;
+ tempUri.flag = LWM2M_URI_FLAG_INSTANCE_ID;
+ instParamP = prv_findAttributes(contextP, &tempUri, serverP);
+
+ if (objParamP != NULL)
+ {
+ if (instParamP != NULL)
+ {
+ memset(&mergedParam, 0, sizeof(lwm2m_attributes_t));
+ mergedParam.toSet = objParamP->toSet | instParamP->toSet;
+ if (mergedParam.toSet & LWM2M_ATTR_FLAG_MIN_PERIOD)
+ {
+ if (instParamP->toSet & LWM2M_ATTR_FLAG_MIN_PERIOD)
+ {
+ mergedParam.minPeriod = instParamP->minPeriod;
+ }
+ else
+ {
+ mergedParam.minPeriod = objParamP->minPeriod;
+ }
+ }
+ if (mergedParam.toSet & LWM2M_ATTR_FLAG_MAX_PERIOD)
+ {
+ if (instParamP->toSet & LWM2M_ATTR_FLAG_MAX_PERIOD)
+ {
+ mergedParam.maxPeriod = instParamP->maxPeriod;
+ }
+ else
+ {
+ mergedParam.maxPeriod = objParamP->maxPeriod;
+ }
+ }
+ paramP = &mergedParam;
+ }
+ else
+ {
+ paramP = objParamP;
+ }
+ }
+ else
+ {
+ paramP = instParamP;
+ }
+ uriP->flag &= ~LWM2M_URI_FLAG_RESOURCE_ID;
+ }
+ else
+ {
+ paramP = NULL;
+
+ if (LWM2M_URI_IS_SET_INSTANCE(uriP))
+ {
+ PRV_CONCAT_STR(bufferLink, PRV_LINK_BUFFER_SIZE, head, LINK_ITEM_START, LINK_ITEM_START_SIZE);
+ PRV_CONCAT_STR(bufferLink, PRV_LINK_BUFFER_SIZE, head, LINK_URI_SEPARATOR, LINK_URI_SEPARATOR_SIZE);
+ res = utils_intToText(uriP->objectId, bufferLink + head, PRV_LINK_BUFFER_SIZE - head);
+ if (res <= 0) return -1;
+ head += res;
+ PRV_CONCAT_STR(bufferLink, PRV_LINK_BUFFER_SIZE, head, LINK_URI_SEPARATOR, LINK_URI_SEPARATOR_SIZE);
+ res = utils_intToText(uriP->instanceId, bufferLink + head, PRV_LINK_BUFFER_SIZE - head);
+ if (res <= 0) return -1;
+ head += res;
+ PRV_CONCAT_STR(bufferLink, PRV_LINK_BUFFER_SIZE, head, LINK_ITEM_END, LINK_ITEM_END_SIZE);
+ parentUri.instanceId = uriP->instanceId;
+ parentUri.flag = LWM2M_URI_FLAG_INSTANCE_ID;
+ if (serverP != NULL)
+ {
+ res = prv_serializeAttributes(contextP, &parentUri, serverP, NULL, bufferLink, head - 1, PRV_LINK_BUFFER_SIZE);
+ if (res < 0) return -1; // careful, 0 is valid
+ }
+ else
+ {
+ res = 0;
+ }
+ head += res;
+ }
+ else
+ {
+ PRV_CONCAT_STR(bufferLink, PRV_LINK_BUFFER_SIZE, head, LINK_ITEM_START, LINK_ITEM_START_SIZE);
+ PRV_CONCAT_STR(bufferLink, PRV_LINK_BUFFER_SIZE, head, LINK_URI_SEPARATOR, LINK_URI_SEPARATOR_SIZE);
+ res = utils_intToText(uriP->objectId, bufferLink + head, PRV_LINK_BUFFER_SIZE - head);
+ if (res <= 0) return -1;
+ head += res;
+ PRV_CONCAT_STR(bufferLink, PRV_LINK_BUFFER_SIZE, head, LINK_ITEM_END, LINK_ITEM_END_SIZE);
+
+ if (serverP != NULL)
+ {
+ res = prv_serializeAttributes(contextP, &parentUri, serverP, NULL, bufferLink, head - 1, PRV_LINK_BUFFER_SIZE);
+ if (res < 0) return -1; // careful, 0 is valid
+ head += res;
+ }
+ }
+ }
+
+ baseUriLen = uri_toString(uriP, baseUriStr, URI_MAX_STRING_LEN, NULL);
+ if (baseUriLen < 0) return -1;
+ baseUriLen -= 1;
+
+ for (index = 0; index < size && head < PRV_LINK_BUFFER_SIZE; index++)
+ {
+ res = prv_serializeLinkData(contextP, dataP + index, serverP, paramP, uriP, baseUriStr, baseUriLen, bufferLink + head, PRV_LINK_BUFFER_SIZE - head);
+ if (res < 0) return -1;
+ head += res;
+ }
+
+ if (head > 0)
+ {
+ head -= 1;
+
+ *bufferP = (uint8_t *)lwm2m_malloc(head);
+ if (*bufferP == NULL) return 0;
+ memcpy(*bufferP, bufferLink, head);
+ }
+
+ return (int)head;
+}
+#endif
\ No newline at end of file