Loading...
--- /dev/null
+++ xnu/xnu-2782.1.97/libkern/c++/OSSerializeBinary.cpp
@@ -0,0 +1,469 @@
+/*
+ * Copyright (c) 2014 Apple Computer, Inc. All rights reserved.
+ *
+ * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
+ *
+ * This file contains Original Code and/or Modifications of Original Code
+ * as defined in and that are subject to the Apple Public Source License
+ * Version 2.0 (the 'License'). You may not use this file except in
+ * compliance with the License. The rights granted to you under the License
+ * may not be used to create, or enable the creation or redistribution of,
+ * unlawful or unlicensed copies of an Apple operating system, or to
+ * circumvent, violate, or enable the circumvention or violation of, any
+ * terms of an Apple operating system software license agreement.
+ *
+ * Please obtain a copy of the License at
+ * http://www.opensource.apple.com/apsl/ and read it before using this file.
+ *
+ * The Original Code and all software distributed under the License are
+ * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
+ * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
+ * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
+ * Please see the License for the specific language governing rights and
+ * limitations under the License.
+ *
+ * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
+ */
+
+
+#include <libkern/c++/OSContainers.h>
+#include <libkern/c++/OSLib.h>
+#include <libkern/c++/OSDictionary.h>
+#include <libkern/OSSerializeBinary.h>
+
+#include <IOKit/IOLib.h>
+
+/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
+
+#if 0
+#define DEBG(fmt, args...) { kprintf(fmt, args); }
+#else
+#define DEBG(fmt, args...) {}
+#endif
+
+/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
+
+OSSerialize *OSSerialize::binaryWithCapacity(unsigned int inCapacity,
+ Editor editor, void * reference)
+{
+ OSSerialize *me;
+
+ if (inCapacity < sizeof(uint32_t)) return (0);
+ me = OSSerialize::withCapacity(inCapacity);
+ if (!me) return (0);
+
+ me->binary = true;
+ me->endCollection = true;
+ me->editor = editor;
+ me->editRef = reference;
+
+ bcopy(kOSSerializeBinarySignature, &me->data[0], sizeof(kOSSerializeBinarySignature));
+ me->length = sizeof(kOSSerializeBinarySignature);
+
+ return (me);
+}
+
+bool OSSerialize::addBinary(const void * bits, size_t size)
+{
+ unsigned int newCapacity;
+ size_t alignSize;
+
+ alignSize = ((size + 3) & ~3L);
+ newCapacity = length + alignSize;
+ if (newCapacity >= capacity)
+ {
+ newCapacity = (((newCapacity - 1) / capacityIncrement) + 1) * capacityIncrement;
+ if (newCapacity < ensureCapacity(newCapacity)) return (false);
+ }
+
+ bcopy(bits, &data[length], size);
+ length += alignSize;
+
+ return (true);
+}
+
+bool OSSerialize::addBinaryObject(const OSMetaClassBase * o, uint32_t key,
+ const void * bits, size_t size)
+{
+ unsigned int newCapacity;
+ size_t alignSize;
+ OSNumber * tagNum;
+
+ // build a tag
+ tagNum = OSNumber::withNumber(tag, 32);
+ tag++;
+ // add to tag dictionary
+ tags->setObject((const OSSymbol *) o, tagNum);
+ tagNum->release();
+
+ alignSize = ((size + sizeof(key) + 3) & ~3L);
+ newCapacity = length + alignSize;
+ if (newCapacity >= capacity)
+ {
+ newCapacity = (((newCapacity - 1) / capacityIncrement) + 1) * capacityIncrement;
+ if (newCapacity < ensureCapacity(newCapacity)) return (false);
+ }
+
+ if (endCollection)
+ {
+ endCollection = false;
+ key |= kOSSerializeEndCollecton;
+ }
+
+ bcopy(&key, &data[length], sizeof(key));
+ bcopy(bits, &data[length + sizeof(key)], size);
+ length += alignSize;
+
+ return (true);
+}
+
+bool OSSerialize::binarySerialize(const OSMetaClassBase *o)
+{
+ OSDictionary * dict;
+ OSArray * array;
+ OSSet * set;
+ OSNumber * num;
+ OSSymbol * sym;
+ OSString * str;
+ OSData * data;
+ OSBoolean * boo;
+
+ OSNumber * tagNum;
+ uint32_t i, key;
+ size_t len;
+ bool ok;
+
+ tagNum = (OSNumber *)tags->getObject((const OSSymbol *) o);
+ // does it exist?
+ if (tagNum)
+ {
+ key = (kOSSerializeObject | tagNum->unsigned32BitValue());
+ if (endCollection)
+ {
+ endCollection = false;
+ key |= kOSSerializeEndCollecton;
+ }
+ ok = addBinary(&key, sizeof(key));
+ return (ok);
+ }
+
+ if ((dict = OSDynamicCast(OSDictionary, o)))
+ {
+ key = (kOSSerializeDictionary | dict->count);
+ ok = addBinaryObject(o, key, NULL, 0);
+ for (i = 0; ok && (i < dict->count);)
+ {
+ const OSSymbol * dictKey;
+ const OSMetaClassBase * dictValue;
+ const OSMetaClassBase * nvalue = 0;
+
+ i++;
+ dictKey = dict->dictionary[i-1].key;
+ dictValue = dict->dictionary[i-1].value;
+ if (editor)
+ {
+ dictValue = nvalue = (*editor)(editRef, this, dict, dictKey, dictValue);
+ if (!dictValue) dictValue = dict;
+ }
+ ok = binarySerialize(dictKey);
+ if (!ok) break;
+ endCollection = (i == dict->count);
+ ok = binarySerialize(dictValue);
+ if (!ok) ok = dictValue->serialize(this);
+ if (nvalue) nvalue->release();
+// if (!ok) ok = binarySerialize(kOSBooleanFalse);
+ }
+ }
+ else if ((array = OSDynamicCast(OSArray, o)))
+ {
+ key = (kOSSerializeArray | array->count);
+ ok = addBinaryObject(o, key, NULL, 0);
+ for (i = 0; ok && (i < array->count);)
+ {
+ i++;
+ endCollection = (i == array->count);
+ ok = binarySerialize(array->array[i-1]);
+ if (!ok) ok = array->array[i-1]->serialize(this);
+// if (!ok) ok = binarySerialize(kOSBooleanFalse);
+ }
+ }
+ else if ((set = OSDynamicCast(OSSet, o)))
+ {
+ key = (kOSSerializeSet | set->members->count);
+ ok = addBinaryObject(o, key, NULL, 0);
+ for (i = 0; ok && (i < set->members->count);)
+ {
+ i++;
+ endCollection = (i == set->members->count);
+ ok = binarySerialize(set->members->array[i-1]);
+ if (!ok) ok = set->members->array[i-1]->serialize(this);
+// if (!ok) ok = binarySerialize(kOSBooleanFalse);
+ }
+ }
+ else if ((num = OSDynamicCast(OSNumber, o)))
+ {
+ key = (kOSSerializeNumber | num->size);
+ ok = addBinaryObject(o, key, &num->value, sizeof(num->value));
+ }
+ else if ((boo = OSDynamicCast(OSBoolean, o)))
+ {
+ key = (kOSSerializeBoolean | (kOSBooleanTrue == boo));
+ ok = addBinaryObject(o, key, NULL, 0);
+ }
+ else if ((sym = OSDynamicCast(OSSymbol, o)))
+ {
+ len = (sym->getLength() + 1);
+ key = (kOSSerializeSymbol | len);
+ ok = addBinaryObject(o, key, sym->getCStringNoCopy(), len);
+ }
+ else if ((str = OSDynamicCast(OSString, o)))
+ {
+ len = (str->getLength() + 0);
+ key = (kOSSerializeString | len);
+ ok = addBinaryObject(o, key, str->getCStringNoCopy(), len);
+ }
+ else if ((data = OSDynamicCast(OSData, o)))
+ {
+ len = data->getLength();
+ if (data->reserved && data->reserved->disableSerialization) len = 0;
+ key = (kOSSerializeData | len);
+ ok = addBinaryObject(o, key, data->getBytesNoCopy(), len);
+ }
+ else return (false);
+
+ return (ok);
+}
+
+/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
+
+#define setAtIndex(v, idx, o) \
+ if (idx >= v##Capacity) \
+ { \
+ uint32_t ncap = v##Capacity + 64; \
+ typeof(v##Array) nbuf = (typeof(v##Array)) kalloc(ncap * sizeof(o)); \
+ if (!nbuf) ok = false; \
+ if (v##Array) \
+ { \
+ bcopy(v##Array, nbuf, v##Capacity * sizeof(o)); \
+ kfree(v##Array, v##Capacity * sizeof(o)); \
+ } \
+ v##Array = nbuf; \
+ v##Capacity = ncap; \
+ } \
+ if (ok) v##Array[idx] = o;
+
+/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
+
+OSObject *
+OSUnserializeBinary(const char *buffer, size_t bufferSize, OSString **errorString)
+{
+ OSObject ** objsArray;
+ uint32_t objsCapacity;
+ uint32_t objsIdx;
+
+ OSObject ** stackArray;
+ uint32_t stackCapacity;
+ uint32_t stackIdx;
+
+ OSObject * result;
+ OSObject * parent;
+ OSDictionary * dict;
+ OSArray * array;
+ OSSet * set;
+ OSDictionary * newDict;
+ OSArray * newArray;
+ OSSet * newSet;
+ OSObject * o;
+ OSSymbol * sym;
+
+ size_t bufferPos;
+ const uint32_t * next;
+ uint32_t key, len, wordLen;
+ bool end, newCollect, isRef;
+ unsigned long long value;
+ bool ok;
+
+ if (errorString) *errorString = 0;
+ if (0 != strcmp(kOSSerializeBinarySignature, buffer)) return (NULL);
+ if (3 & ((uintptr_t) buffer)) return (NULL);
+ if (bufferSize < sizeof(kOSSerializeBinarySignature)) return (NULL);
+ bufferPos = sizeof(kOSSerializeBinarySignature);
+ next = (typeof(next)) (((uintptr_t) buffer) + bufferPos);
+
+ DEBG("---------OSUnserializeBinary(%p)\n", buffer);
+
+ objsArray = stackArray = NULL;
+ objsIdx = objsCapacity = 0;
+ stackIdx = stackCapacity = 0;
+
+ result = 0;
+ parent = 0;
+ dict = 0;
+ array = 0;
+ set = 0;
+ sym = 0;
+
+ ok = true;
+ while (ok)
+ {
+ bufferPos += sizeof(*next);
+ if (!(ok = (bufferPos <= bufferSize))) break;
+ key = *next++;
+
+ len = (key & kOSSerializeDataMask);
+ wordLen = (len + 3) >> 2;
+ end = (0 != (kOSSerializeEndCollecton & key));
+ DEBG("key 0x%08x: 0x%04x, %d\n", key, len, end);
+
+ newCollect = isRef = false;
+ o = 0; newDict = 0; newArray = 0; newSet = 0;
+
+ switch (kOSSerializeTypeMask & key)
+ {
+ case kOSSerializeDictionary:
+ o = newDict = OSDictionary::withCapacity(len);
+ newCollect = (len != 0);
+ break;
+ case kOSSerializeArray:
+ o = newArray = OSArray::withCapacity(len);
+ newCollect = (len != 0);
+ break;
+ case kOSSerializeSet:
+ o = newSet = OSSet::withCapacity(len);
+ newCollect = (len != 0);
+ break;
+
+ case kOSSerializeObject:
+ if (len >= objsIdx) break;
+ o = objsArray[len];
+ o->retain();
+ isRef = true;
+ break;
+
+ case kOSSerializeNumber:
+ bufferPos += sizeof(long long);
+ if (bufferPos > bufferSize) break;
+ value = next[1];
+ value <<= 32;
+ value |= next[0];
+ o = OSNumber::withNumber(value, len);
+ next += 2;
+ break;
+
+ case kOSSerializeSymbol:
+ bufferPos += (wordLen * sizeof(uint32_t));
+ if (bufferPos > bufferSize) break;
+ if (0 != ((const char *)next)[len-1]) break;
+ o = (OSObject *) OSSymbol::withCString((const char *) next);
+ next += wordLen;
+ break;
+
+ case kOSSerializeString:
+ bufferPos += (wordLen * sizeof(uint32_t));
+ if (bufferPos > bufferSize) break;
+ o = OSString::withStringOfLength((const char *) next, len);
+ next += wordLen;
+ break;
+
+ case kOSSerializeData:
+ bufferPos += (wordLen * sizeof(uint32_t));
+ if (bufferPos > bufferSize) break;
+ o = OSData::withBytes(next, len);
+ next += wordLen;
+ break;
+
+ case kOSSerializeBoolean:
+ o = (len ? kOSBooleanTrue : kOSBooleanFalse);
+ break;
+
+ default:
+ break;
+ }
+
+ if (!(ok = (o != 0))) break;
+
+ if (!isRef)
+ {
+ setAtIndex(objs, objsIdx, o);
+ if (!ok) break;
+ objsIdx++;
+ }
+
+ if (dict)
+ {
+ if (sym)
+ {
+ DEBG("%s = %s\n", sym->getCStringNoCopy(), o->getMetaClass()->getClassName());
+ if (o != dict) ok = dict->setObject(sym, o);
+ o->release();
+ sym->release();
+ sym = 0;
+ }
+ else
+ {
+ sym = OSDynamicCast(OSSymbol, o);
+ ok = (sym != 0);
+ }
+ }
+ else if (array)
+ {
+ ok = array->setObject(o);
+ o->release();
+ }
+ else if (set)
+ {
+ ok = set->setObject(o);
+ o->release();
+ }
+ else
+ {
+ assert(!parent);
+ result = o;
+ }
+
+ if (!ok) break;
+
+ if (newCollect)
+ {
+ if (!end)
+ {
+ stackIdx++;
+ setAtIndex(stack, stackIdx, parent);
+ if (!ok) break;
+ }
+ DEBG("++stack[%d] %p\n", stackIdx, parent);
+ parent = o;
+ dict = newDict;
+ array = newArray;
+ set = newSet;
+ end = false;
+ }
+
+ if (end)
+ {
+ if (!stackIdx) break;
+ parent = stackArray[stackIdx];
+ DEBG("--stack[%d] %p\n", stackIdx, parent);
+ stackIdx--;
+ set = 0;
+ dict = 0;
+ array = 0;
+ if (!(dict = OSDynamicCast(OSDictionary, parent)))
+ {
+ if (!(array = OSDynamicCast(OSArray, parent))) ok = (0 != (set = OSDynamicCast(OSSet, parent)));
+ }
+ }
+ }
+ DEBG("ret %p\n", result);
+
+ if (objsCapacity) kfree(objsArray, objsCapacity * sizeof(*objsArray));
+ if (stackCapacity) kfree(stackArray, stackCapacity * sizeof(*stackArray));
+
+ if (!ok && result)
+ {
+ result->release();
+ result = 0;
+ }
+ return (result);
+}