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authorLuca Muscariello <lumuscar+fdio@cisco.com>2017-02-23 20:44:26 +0100
committerLuca Muscariello <lumuscar+fdio@cisco.com>2017-02-23 19:51:14 +0000
commitd18ae43123fcd7604d1c36a1ec8450dbe6071824 (patch)
tree2d49fc3aabd0f2607251c854565648d47b56b2e9 /libccnx-common/ccnx/common/ccnx_ManifestHashGroup.c
parent9b30fc10fb1cbebe651e5a107e8ca5b24de54675 (diff)
Initial commit: ccnxlibs.
Change-Id: I1b376527a7dd01a6b9e083a6cb646955902f45c0 Signed-off-by: Luca Muscariello <lumuscar+fdio@cisco.com>
Diffstat (limited to 'libccnx-common/ccnx/common/ccnx_ManifestHashGroup.c')
-rw-r--r--libccnx-common/ccnx/common/ccnx_ManifestHashGroup.c592
1 files changed, 592 insertions, 0 deletions
diff --git a/libccnx-common/ccnx/common/ccnx_ManifestHashGroup.c b/libccnx-common/ccnx/common/ccnx_ManifestHashGroup.c
new file mode 100644
index 00000000..cfe37742
--- /dev/null
+++ b/libccnx-common/ccnx/common/ccnx_ManifestHashGroup.c
@@ -0,0 +1,592 @@
+/*
+ * Copyright (c) 2017 Cisco and/or its affiliates.
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at:
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+/**
+ */
+#include <config.h>
+#include <stdio.h>
+#include <string.h>
+
+#include <LongBow/runtime.h>
+
+#include <parc/algol/parc_Object.h>
+#include <parc/algol/parc_LinkedList.h>
+
+#include <ccnx/common/ccnx_Interest.h>
+#include <ccnx/common/ccnx_ManifestHashGroup.h>
+#include <ccnx/common/internal/ccnx_WireFormatMessageInterface.h>
+
+#define MAX_NUMBER_OF_POINTERS 1500 // loose upper bound imposed by packet format
+
+struct ccnx_manifest_hash_group {
+ PARCLinkedList *pointers;
+
+ // Metadata
+ const PARCBuffer *overallDataDigest; // overall *application data* digest
+ size_t dataSize; // size for all pointers (last pointer might not be entrySize unless perfectly balanced)
+ size_t entrySize; // size per pointer
+ size_t blockSize; // size of nodes used in the tree (e.g., 4K for each Manifest or Data node)
+ size_t treeHeight; // height of sub-tree referred to by each pointer
+ const CCNxName *locator; // locator for the hash group
+};
+
+struct ccnx_manifest_hash_group_pointer {
+ CCNxManifestHashGroupPointerType pointerType;
+ PARCBuffer *digest;
+};
+
+static bool
+CCNxManifestHashGroupPointer_FinalRelease(CCNxManifestHashGroupPointer **ptrP)
+{
+ if ((*ptrP)->digest != NULL) {
+ parcBuffer_Release(&(*ptrP)->digest);
+ }
+ return true;
+}
+
+static bool
+_CCNxManifestHashGroupPointer_Equals(const CCNxManifestHashGroupPointer *objectA, const CCNxManifestHashGroupPointer *objectB)
+{
+ if (objectA == objectB) {
+ return true;
+ }
+ if (objectA == NULL || objectB == NULL) {
+ return false;
+ }
+ if (objectA->pointerType == objectB->pointerType) {
+ if (parcBuffer_Equals(objectA->digest, objectB->digest)) {
+ return true;
+ }
+ }
+ return false;
+}
+
+parcObject_Override(CCNxManifestHashGroupPointer, PARCObject,
+ .destructor = (PARCObjectDestructor *) CCNxManifestHashGroupPointer_FinalRelease,
+ .equals = (PARCObjectEquals *) _CCNxManifestHashGroupPointer_Equals);
+
+parcObject_ImplementAcquire(ccnxManifestHashGroupPointer, CCNxManifestHashGroupPointer);
+parcObject_ImplementRelease(ccnxManifestHashGroupPointer, CCNxManifestHashGroupPointer);
+
+CCNxManifestHashGroupPointer *
+ccnxManifestHashGroupPointer_Create(CCNxManifestHashGroupPointerType type, const PARCBuffer *digest)
+{
+ CCNxManifestHashGroupPointer *ptr = parcObject_CreateAndClearInstance(CCNxManifestHashGroupPointer);
+ if (ptr != NULL) {
+ ptr->pointerType = type;
+ ptr->digest = parcBuffer_Acquire(digest);
+ }
+ return ptr;
+}
+
+CCNxManifestHashGroupPointerType
+ccnxManifestHashGroupPointer_GetType(const CCNxManifestHashGroupPointer *ptr)
+{
+ return ptr->pointerType;
+}
+
+const PARCBuffer *
+ccnxManifestHashGroupPointer_GetDigest(const CCNxManifestHashGroupPointer *ptr)
+{
+ return ptr->digest;
+}
+
+static bool
+_ccnxManifestHashGroup_Destructor(CCNxManifestHashGroup **groupP)
+{
+ if ((*groupP)->pointers != NULL) {
+ parcLinkedList_Release(&(*groupP)->pointers);
+ }
+ if ((*groupP)->overallDataDigest != NULL) {
+ parcBuffer_Release((PARCBuffer **) &(*groupP)->overallDataDigest);
+ }
+ if ((*groupP)->locator != NULL) {
+ ccnxName_Release((CCNxName **) &(*groupP)->locator);
+ }
+ return true;
+}
+
+parcObject_Override(CCNxManifestHashGroup, PARCObject,
+ .destructor = (PARCObjectDestructor *) _ccnxManifestHashGroup_Destructor,
+ .toString = (PARCObjectToString *) ccnxManifestHashGroup_ToString,
+ .equals = (PARCObjectEquals *) ccnxManifestHashGroup_Equals);
+
+parcObject_ImplementAcquire(ccnxManifestHashGroup, CCNxManifestHashGroup);
+parcObject_ImplementRelease(ccnxManifestHashGroup, CCNxManifestHashGroup);
+
+CCNxManifestHashGroup *
+ccnxManifestHashGroup_Create(void)
+{
+ CCNxManifestHashGroup *section = parcObject_CreateAndClearInstance(CCNxManifestHashGroup);
+
+ if (section != NULL) {
+ section->pointers = parcLinkedList_Create();
+
+ section->overallDataDigest = NULL;
+ section->dataSize = 0;
+ section->entrySize = 0;
+ section->blockSize = 0;
+ section->treeHeight = 0;
+ section->locator = NULL;
+ }
+
+ return section;
+}
+
+bool
+ccnxManifestHashGroup_AppendPointer(CCNxManifestHashGroup *group, CCNxManifestHashGroupPointerType type, const PARCBuffer *buffer)
+{
+ if (!ccnxManifestHashGroup_IsFull(group)) {
+ CCNxManifestHashGroupPointer *ptr = ccnxManifestHashGroupPointer_Create(type, buffer);
+ parcLinkedList_Append(group->pointers, ptr);
+ ccnxManifestHashGroupPointer_Release(&ptr);
+ return true;
+ }
+ return false;
+}
+
+bool
+ccnxManifestHashGroup_PrependPointer(CCNxManifestHashGroup *group, CCNxManifestHashGroupPointerType type, const PARCBuffer *buffer)
+{
+ if (!ccnxManifestHashGroup_IsFull(group)) {
+ CCNxManifestHashGroupPointer *ptr = ccnxManifestHashGroupPointer_Create(type, buffer);
+ parcLinkedList_Prepend(group->pointers, ptr);
+ ccnxManifestHashGroupPointer_Release(&ptr);
+ return true;
+ }
+ return false;
+}
+
+void
+ccnxManifestHashGroup_SetOverallDataDigest(CCNxManifestHashGroup *group, const PARCBuffer *digest)
+{
+ group->overallDataDigest = parcBuffer_Acquire(digest);
+}
+
+const PARCBuffer *
+ccnxManifestHashGroup_GetOverallDataDigest(const CCNxManifestHashGroup *group)
+{
+ return group->overallDataDigest;
+}
+
+size_t
+ccnxManifestHashGroup_GetTotalSize(const CCNxManifestHashGroup *group)
+{
+ return group->dataSize;
+}
+
+size_t
+ccnxManifestHashGroup_GetChildBlockSize(const CCNxManifestHashGroup *group)
+{
+ return group->entrySize;
+}
+
+void
+ccnxManifestHashGroup_SetLocator(CCNxManifestHashGroup *group, const CCNxName *locator)
+{
+ group->locator = ccnxName_Acquire(locator);
+}
+
+const CCNxName *
+ccnxManifestHashGroup_GetLocator(const CCNxManifestHashGroup *group)
+{
+ return group->locator;
+}
+
+size_t
+ccnxManifestHashGroup_GetNumberOfPointers(const CCNxManifestHashGroup *group)
+{
+ return parcLinkedList_Size(group->pointers);
+}
+
+CCNxManifestHashGroupPointer *
+ccnxManifestHashGroup_GetPointerAtIndex(const CCNxManifestHashGroup *group, size_t index)
+{
+ CCNxManifestHashGroupPointer *entry = parcLinkedList_GetAtIndex(group->pointers, index);
+ return entry;
+}
+
+CCNxManifestHashGroupPointerType
+ccnxManifestHashGroup_GetPointerTypeAtIndex(const CCNxManifestHashGroup *group, size_t index)
+{
+ CCNxManifestHashGroupPointer *entry = parcLinkedList_GetAtIndex(group->pointers, index);
+ return entry->pointerType;
+}
+
+PARCBuffer *
+ccnxManifestHashGroup_GetPointerDigestAtIndex(const CCNxManifestHashGroup *group, size_t index)
+{
+ CCNxManifestHashGroupPointer *entry = parcLinkedList_GetAtIndex(group->pointers, index);
+ return entry->digest;
+}
+
+bool
+ccnxManifestHashGroup_IsFull(const CCNxManifestHashGroup *group)
+{
+ size_t size = parcLinkedList_Size(group->pointers);
+ return size >= MAX_NUMBER_OF_POINTERS;
+}
+
+bool
+ccnxManifestHashGroup_Equals(const CCNxManifestHashGroup *objectA, const CCNxManifestHashGroup *objectB)
+{
+ if (objectA == objectB) {
+ return true;
+ }
+ if (objectA == NULL || objectB == NULL) {
+ return false;
+ }
+
+ if (objectA->dataSize == objectB->dataSize) {
+ if (objectA->entrySize == objectB->entrySize) {
+ if (objectA->blockSize == objectB->blockSize) {
+ if (objectA->treeHeight == objectB->treeHeight) {
+ if (ccnxName_Equals(objectA->locator, objectB->locator)) {
+ if (parcBuffer_Equals(objectA->overallDataDigest, objectB->overallDataDigest)) {
+ if (parcLinkedList_Size(objectA->pointers) == parcLinkedList_Size(objectB->pointers)) {
+ for (size_t i = 0; i < parcLinkedList_Size(objectA->pointers); i++) {
+ CCNxManifestHashGroupPointer *ptrA = parcLinkedList_GetAtIndex(objectA->pointers, i);
+ CCNxManifestHashGroupPointer *ptrB = parcLinkedList_GetAtIndex(objectB->pointers, i);
+ if (!_CCNxManifestHashGroupPointer_Equals(ptrA, ptrB)) {
+ return false;
+ }
+ }
+ return true;
+ }
+ }
+ }
+ }
+ }
+ }
+ }
+
+ return false;
+}
+
+char *
+ccnxManifestHashGroup_ToString(const CCNxManifestHashGroup *section)
+{
+ PARCJSON *json = ccnxManifestHashGroup_ToJson(section);
+ char *stringRep = parcJSON_ToString(json);
+ parcJSON_Release(&json);
+ return stringRep;
+}
+
+PARCJSON *
+ccnxManifestHashGroup_ToJson(const CCNxManifestHashGroup *group)
+{
+ PARCJSON *root = parcJSON_Create();
+
+ PARCJSONArray *ptrList = parcJSONArray_Create();
+ for (size_t i = 0; i < parcLinkedList_Size(group->pointers); i++) {
+ CCNxManifestHashGroupPointer *ptr = (CCNxManifestHashGroupPointer *) parcLinkedList_GetAtIndex(group->pointers, i);
+ PARCJSON *ptrJson = parcJSON_Create();
+
+ // Type.
+ parcJSON_AddInteger(ptrJson, "type", ccnxManifestHashGroupPointer_GetType(ptr));
+
+ // Digest.
+ char *digestString = parcBuffer_ToHexString(ptr->digest);
+ parcJSON_AddString(ptrJson, "digest", digestString);
+ parcMemory_Deallocate(&digestString);
+
+ // Add the tuple to the list.
+ PARCJSONValue *val = parcJSONValue_CreateFromJSON(ptrJson);
+ parcJSONArray_AddValue(ptrList, val);
+
+ // Cleanup
+ parcJSONValue_Release(&val);
+ parcJSON_Release(&ptrJson);
+ }
+ root = parcJSON_AddArray(root, "HashGroup", ptrList);
+ parcJSONArray_Release(&ptrList);
+
+ if (group->overallDataDigest != NULL) {
+ char *digestString = parcBuffer_ToHexString(group->overallDataDigest);
+ root = parcJSON_AddString(root, "overallDataDigest", digestString);
+ parcMemory_Deallocate((void **) &digestString);
+ }
+
+ if (group->locator != NULL) {
+ char *locatorString = ccnxName_ToString(group->locator);
+ root = parcJSON_AddString(root, "locator", locatorString);
+ parcMemory_Deallocate((void **) &locatorString);
+ }
+
+ if (group->entrySize > 0) {
+ root = parcJSON_AddInteger(root, "entrySize", group->entrySize);
+ }
+
+ if (group->dataSize > 0) {
+ root = parcJSON_AddInteger(root, "dataSize", group->dataSize);
+ }
+
+ if (group->blockSize > 0) {
+ root = parcJSON_AddInteger(root, "blockSize", group->blockSize);
+ }
+
+ if (group->treeHeight > 0) {
+ root = parcJSON_AddInteger(root, "treeHeight", group->treeHeight);
+ }
+
+ return root;
+}
+
+CCNxManifestHashGroup *
+ccnxManifestHashGroup_CreateFromJson(const PARCJSON *json)
+{
+ CCNxManifestHashGroup *group = ccnxManifestHashGroup_Create();
+
+ PARCJSONValue *ptrListValue = parcJSON_GetValueByName(json, "HashGroup");
+ PARCJSONArray *ptrList = parcJSONValue_GetArray(ptrListValue);
+ size_t numberOfPointers = parcJSONArray_GetLength(ptrList);
+ for (size_t i = 0; i < numberOfPointers; i++) {
+ PARCJSONValue *pointerValue = parcJSONArray_GetValue(ptrList, i);
+
+ PARCJSON *typeJson = parcJSONValue_GetJSON(pointerValue);
+ PARCJSONValue *typeValue = parcJSON_GetValueByName(typeJson, "type");
+ CCNxManifestHashGroupPointerType type;
+
+ if (parcJSONValue_GetInteger(typeValue) == 0) {
+ type = CCNxManifestHashGroupPointerType_Data;
+ } else {
+ type = CCNxManifestHashGroupPointerType_Manifest;
+ }
+
+ PARCJSON *digestJson = parcJSONValue_GetJSON(pointerValue);
+ PARCJSONValue *digestValue = parcJSON_GetValueByName(digestJson, "digest");
+ PARCBuffer *digestHex = parcJSONValue_GetString(digestValue);
+
+ char *hexString = parcBuffer_ToString(digestHex);
+ PARCBuffer *digest = parcBuffer_Flip(parcBuffer_ParseHexString(hexString));
+ parcMemory_Deallocate(&hexString);
+
+ ccnxManifestHashGroup_AppendPointer(group, type, digest);
+ parcBuffer_Release(&digest);
+ }
+
+ if (parcJSON_GetPairByName(json, "overallDataDigest") != NULL) {
+ PARCJSONValue *overallDataDigestValue = parcJSON_GetValueByName(json, "overallDataDigest");
+ PARCBuffer *digestHex = parcJSONValue_GetString(overallDataDigestValue);
+
+ char *hexString = parcBuffer_ToString(digestHex);
+ group->overallDataDigest = parcBuffer_Flip(parcBuffer_ParseHexString(hexString));
+ parcMemory_Deallocate(&hexString);
+ }
+
+ if (parcJSON_GetPairByName(json, "locator") != NULL) {
+ PARCJSONValue *locatorValue = parcJSON_GetValueByName(json, "locator");
+ PARCBuffer *buffer = parcJSONValue_GetString(locatorValue);
+ char *locator = parcBuffer_ToString(buffer);
+ group->locator = ccnxName_CreateFromCString(locator);
+ parcMemory_Deallocate(&locator);
+ }
+
+ if (parcJSON_GetPairByName(json, "entrySize") != NULL) {
+ PARCJSONValue *childBlockNodeSizeValue = parcJSON_GetValueByName(json, "entrySize");
+ group->entrySize = parcJSONValue_GetInteger(childBlockNodeSizeValue);
+ }
+
+ if (parcJSON_GetPairByName(json, "dataSize") != NULL) {
+ PARCJSONValue *totalSizeValue = parcJSON_GetValueByName(json, "dataSize");
+ group->dataSize = parcJSONValue_GetInteger(totalSizeValue);
+ }
+
+ if (parcJSON_GetPairByName(json, "blockSize") != NULL) {
+ PARCJSONValue *blockSizeValue = parcJSON_GetValueByName(json, "blockSize");
+ group->blockSize = parcJSONValue_GetInteger(blockSizeValue);
+ }
+
+ if (parcJSON_GetPairByName(json, "treeHeight") != NULL) {
+ PARCJSONValue *treeHeightValue = parcJSON_GetValueByName(json, "treeHeight");
+ group->treeHeight = parcJSONValue_GetInteger(treeHeightValue);
+ }
+
+ return group;
+}
+
+struct _hashgroup_ccnxManifestHashGroupIterator_state {
+ size_t pointerNumber;
+ bool atEnd;
+};
+typedef struct _hashgroup_ccnxManifestHashGroupIterator_state _HashgroupIteratorState;
+
+static void *
+_ccnxManifestHashGroupIterator_Init(CCNxManifestHashGroup *group)
+{
+ _HashgroupIteratorState *state = parcMemory_Allocate(sizeof(_HashgroupIteratorState));
+ state->pointerNumber = 0;
+ state->atEnd = false;
+ return state;
+}
+
+static bool
+_ccnxManifestHashGroupIterator_HasNext(CCNxManifestHashGroup *group, void *voidstate)
+{
+ _HashgroupIteratorState *state = (_HashgroupIteratorState *) voidstate;
+ return !state->atEnd;
+}
+
+static void *
+_ccnxManifestHashGroupIterator_Next(CCNxManifestHashGroup *group, void *state)
+{
+ _HashgroupIteratorState *thestate = (_HashgroupIteratorState *) state;
+ thestate->pointerNumber++;
+
+ if (thestate->pointerNumber == parcLinkedList_Size(group->pointers)) {
+ thestate->atEnd = true;
+ }
+
+ return thestate;
+}
+
+static void
+_ccnxManifestHashGroupIterator_RemoveAt(CCNxManifestHashGroup *group, void **state)
+{
+ // pass
+}
+
+static void *
+_ccnxManifestHashGroupIterator_GetElement(CCNxManifestHashGroup *group, void *state)
+{
+ _HashgroupIteratorState *thestate = (_HashgroupIteratorState *) state;
+ CCNxManifestHashGroupPointer *ptr =
+ (CCNxManifestHashGroupPointer *) parcLinkedList_GetAtIndex(group->pointers, thestate->pointerNumber - 1);
+ return ptr;
+}
+
+static void
+_ccnxManifestHashGroupIterator_Finish(CCNxManifestHashGroup *group, void *state)
+{
+ _HashgroupIteratorState *thestate = (_HashgroupIteratorState *) state;
+ parcMemory_Deallocate(&thestate);
+}
+
+static void
+_ccnxManifestHashGroupIterator_AssertValid(const void *state)
+{
+ // pass
+}
+
+PARCIterator *
+ccnxManifestHashGroup_Iterator(const CCNxManifestHashGroup *group)
+{
+ PARCIterator *iterator = parcIterator_Create((void *) group,
+ (void *(*)(PARCObject *))_ccnxManifestHashGroupIterator_Init,
+ (bool (*)(PARCObject *, void *))_ccnxManifestHashGroupIterator_HasNext,
+ (void *(*)(PARCObject *, void *))_ccnxManifestHashGroupIterator_Next,
+ (void (*)(PARCObject *, void **))_ccnxManifestHashGroupIterator_RemoveAt,
+ (void *(*)(PARCObject *, void *))_ccnxManifestHashGroupIterator_GetElement,
+ (void (*)(PARCObject *, void *))_ccnxManifestHashGroupIterator_Finish,
+ (void (*)(const void *))_ccnxManifestHashGroupIterator_AssertValid);
+
+ return iterator;
+}
+
+size_t
+ccnxManifestHashGroup_GetBlockSize(const CCNxManifestHashGroup *group)
+{
+ return group->blockSize;
+}
+
+void
+ccnxManifestHashGroup_SetBlockSize(CCNxManifestHashGroup *group, size_t blockSize)
+{
+ group->blockSize = blockSize;
+}
+
+size_t
+ccnxManifestHashGroup_GetDataSize(const CCNxManifestHashGroup *group)
+{
+ return group->dataSize;
+}
+
+void
+ccnxManifestHashGroup_SetDataSize(CCNxManifestHashGroup *group, size_t dataSize)
+{
+ group->dataSize = dataSize;
+}
+
+size_t
+ccnxManifestHashGroup_GetEntrySize(const CCNxManifestHashGroup *group)
+{
+ return group->entrySize;
+}
+
+void
+ccnxManifestHashGroup_SetEntrySize(CCNxManifestHashGroup *group, size_t entrySize)
+{
+ group->entrySize = entrySize;
+}
+
+size_t
+ccnxManifestHashGroup_GetTreeHeight(const CCNxManifestHashGroup *group)
+{
+ return group->treeHeight;
+}
+
+void
+ccnxManifestHashGroup_SetTreeHeight(CCNxManifestHashGroup *group, size_t treeHeight)
+{
+ group->treeHeight = treeHeight;
+}
+
+bool
+ccnxManifestHashGroup_HasMetadata(const CCNxManifestHashGroup *group)
+{
+ // Check the existence of each metadata value.
+ if (group->blockSize > 0) {
+ return true;
+ }
+ if (group->dataSize > 0) {
+ return true;
+ }
+ if (group->entrySize > 0) {
+ return true;
+ }
+ if (group->locator != NULL) {
+ return true;
+ }
+ if (group->overallDataDigest != NULL) {
+ return true;
+ }
+
+ return false;
+}
+
+PARCLinkedList *
+ccnxManifestHashGroup_CreateInterestList(const CCNxManifestHashGroup *group, const CCNxName *locator)
+{
+ PARCLinkedList *interestList = parcLinkedList_Create();
+
+ PARCIterator *itr = ccnxManifestHashGroup_Iterator(group);
+ while (parcIterator_HasNext(itr)) {
+ // Extract the name and digest
+ CCNxManifestHashGroupPointer *ptr = parcIterator_Next(itr);
+ const PARCBuffer *digest = ccnxManifestHashGroupPointer_GetDigest(ptr);
+ const CCNxName *name = group->locator == NULL ? locator : group->locator;
+
+ // Build the interest and append it to the running list
+ if (name != NULL) {
+ CCNxInterest *interest = ccnxInterest_CreateSimple(name);
+ ccnxInterest_SetContentObjectHashRestriction(interest, digest);
+ parcLinkedList_Append(interestList, interest);
+ ccnxInterest_Release(&interest);
+ }
+ }
+ parcIterator_Release(&itr);
+
+ return interestList;
+}