| /* |
| * Copyright (C) 2018 The Android Open Source Project |
| * |
| * 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 <android/binder_parcel.h> |
| #include "parcel_internal.h" |
| |
| #include "ibinder_internal.h" |
| #include "status_internal.h" |
| |
| #include <limits> |
| |
| #include <android-base/logging.h> |
| #include <android-base/unique_fd.h> |
| #include <binder/Parcel.h> |
| #include <binder/ParcelFileDescriptor.h> |
| #include <utils/Unicode.h> |
| |
| using ::android::IBinder; |
| using ::android::Parcel; |
| using ::android::sp; |
| using ::android::status_t; |
| using ::android::base::unique_fd; |
| using ::android::os::ParcelFileDescriptor; |
| |
| template <typename T> |
| using ContiguousArrayGetter = T* (*)(void* arrayData); |
| template <typename T> |
| using ArrayGetter = T (*)(const void* arrayData, size_t index); |
| template <typename T> |
| using ArraySetter = void (*)(void* arrayData, size_t index, T value); |
| |
| template <typename T> |
| binder_status_t WriteArray(AParcel* parcel, const T* array, size_t length) { |
| if (length > std::numeric_limits<int32_t>::max()) return STATUS_BAD_VALUE; |
| |
| Parcel* rawParcel = parcel->get(); |
| |
| status_t status = rawParcel->writeInt32(static_cast<int32_t>(length)); |
| if (status != STATUS_OK) return PruneStatusT(status); |
| |
| int32_t size = 0; |
| if (__builtin_smul_overflow(sizeof(T), length, &size)) return STATUS_NO_MEMORY; |
| |
| void* const data = rawParcel->writeInplace(size); |
| if (data == nullptr) return STATUS_NO_MEMORY; |
| |
| memcpy(data, array, size); |
| |
| return STATUS_OK; |
| } |
| |
| // Each element in a char16_t array is converted to an int32_t (not packed). |
| template <> |
| binder_status_t WriteArray<char16_t>(AParcel* parcel, const char16_t* array, size_t length) { |
| if (length > std::numeric_limits<int32_t>::max()) return STATUS_BAD_VALUE; |
| |
| Parcel* rawParcel = parcel->get(); |
| |
| status_t status = rawParcel->writeInt32(static_cast<int32_t>(length)); |
| if (status != STATUS_OK) return PruneStatusT(status); |
| |
| int32_t size = 0; |
| if (__builtin_smul_overflow(sizeof(char16_t), length, &size)) return STATUS_NO_MEMORY; |
| |
| for (int32_t i = 0; i < length; i++) { |
| status = rawParcel->writeChar(array[i]); |
| |
| if (status != STATUS_OK) return PruneStatusT(status); |
| } |
| |
| return STATUS_OK; |
| } |
| |
| template <typename T> |
| binder_status_t ReadArray(const AParcel* parcel, void** arrayData, |
| AParcel_arrayReallocator reallocator, ContiguousArrayGetter<T> getter) { |
| const Parcel* rawParcel = parcel->get(); |
| |
| int32_t length; |
| status_t status = rawParcel->readInt32(&length); |
| |
| if (status != STATUS_OK) return PruneStatusT(status); |
| if (length < 0) return STATUS_UNEXPECTED_NULL; |
| |
| *arrayData = reallocator(*arrayData, length); |
| if (*arrayData == nullptr) return STATUS_NO_MEMORY; |
| |
| if (length == 0) return STATUS_OK; |
| |
| T* array = getter(*arrayData); |
| if (array == nullptr) return STATUS_NO_MEMORY; |
| |
| int32_t size = 0; |
| if (__builtin_smul_overflow(sizeof(T), length, &size)) return STATUS_NO_MEMORY; |
| |
| const void* data = rawParcel->readInplace(size); |
| if (data == nullptr) return STATUS_NO_MEMORY; |
| |
| memcpy(array, data, size); |
| |
| return STATUS_OK; |
| } |
| |
| // Each element in a char16_t array is converted to an int32_t (not packed) |
| template <> |
| binder_status_t ReadArray<char16_t>(const AParcel* parcel, void** arrayData, |
| AParcel_arrayReallocator reallocator, |
| ContiguousArrayGetter<char16_t> getter) { |
| const Parcel* rawParcel = parcel->get(); |
| |
| int32_t length; |
| status_t status = rawParcel->readInt32(&length); |
| |
| if (status != STATUS_OK) return PruneStatusT(status); |
| if (length < 0) return STATUS_UNEXPECTED_NULL; |
| |
| *arrayData = reallocator(*arrayData, length); |
| if (*arrayData == nullptr) return STATUS_NO_MEMORY; |
| |
| if (length == 0) return STATUS_OK; |
| |
| char16_t* array = getter(*arrayData); |
| if (array == nullptr) return STATUS_NO_MEMORY; |
| |
| int32_t size = 0; |
| if (__builtin_smul_overflow(sizeof(char16_t), length, &size)) return STATUS_NO_MEMORY; |
| |
| for (int32_t i = 0; i < length; i++) { |
| status = rawParcel->readChar(array + i); |
| |
| if (status != STATUS_OK) return PruneStatusT(status); |
| } |
| |
| return STATUS_OK; |
| } |
| |
| template <typename T> |
| binder_status_t WriteArray(AParcel* parcel, const void* arrayData, ArrayGetter<T> getter, |
| size_t length, status_t (Parcel::*write)(T)) { |
| if (length > std::numeric_limits<int32_t>::max()) return STATUS_BAD_VALUE; |
| |
| Parcel* rawParcel = parcel->get(); |
| |
| status_t status = rawParcel->writeInt32(static_cast<int32_t>(length)); |
| if (status != STATUS_OK) return PruneStatusT(status); |
| |
| for (size_t i = 0; i < length; i++) { |
| status = (rawParcel->*write)(getter(arrayData, i)); |
| |
| if (status != STATUS_OK) return PruneStatusT(status); |
| } |
| |
| return STATUS_OK; |
| } |
| |
| template <typename T> |
| binder_status_t ReadArray(const AParcel* parcel, void** arrayData, |
| AParcel_arrayReallocator reallocator, ArraySetter<T> setter, |
| status_t (Parcel::*read)(T*) const) { |
| const Parcel* rawParcel = parcel->get(); |
| |
| int32_t length; |
| status_t status = rawParcel->readInt32(&length); |
| |
| if (status != STATUS_OK) return PruneStatusT(status); |
| if (length < 0) return STATUS_UNEXPECTED_NULL; |
| |
| *arrayData = reallocator(*arrayData, length); |
| if (*arrayData == nullptr) return STATUS_NO_MEMORY; |
| |
| for (size_t i = 0; i < length; i++) { |
| T readTarget; |
| status = (rawParcel->*read)(&readTarget); |
| if (status != STATUS_OK) return PruneStatusT(status); |
| |
| setter(*arrayData, i, readTarget); |
| } |
| |
| return STATUS_OK; |
| } |
| |
| void AParcel_delete(AParcel* parcel) { |
| delete parcel; |
| } |
| |
| binder_status_t AParcel_writeStrongBinder(AParcel* parcel, AIBinder* binder) { |
| sp<IBinder> writeBinder = binder != nullptr ? binder->getBinder() : nullptr; |
| return parcel->get()->writeStrongBinder(writeBinder); |
| } |
| binder_status_t AParcel_readStrongBinder(const AParcel* parcel, AIBinder** binder) { |
| sp<IBinder> readBinder = nullptr; |
| status_t status = parcel->get()->readStrongBinder(&readBinder); |
| if (status != STATUS_OK) { |
| return PruneStatusT(status); |
| } |
| sp<AIBinder> ret = ABpBinder::lookupOrCreateFromBinder(readBinder); |
| AIBinder_incStrong(ret.get()); |
| *binder = ret.get(); |
| return PruneStatusT(status); |
| } |
| binder_status_t AParcel_readNullableStrongBinder(const AParcel* parcel, AIBinder** binder) { |
| sp<IBinder> readBinder = nullptr; |
| status_t status = parcel->get()->readNullableStrongBinder(&readBinder); |
| if (status != STATUS_OK) { |
| return PruneStatusT(status); |
| } |
| sp<AIBinder> ret = ABpBinder::lookupOrCreateFromBinder(readBinder); |
| AIBinder_incStrong(ret.get()); |
| *binder = ret.get(); |
| return PruneStatusT(status); |
| } |
| |
| binder_status_t AParcel_writeParcelFileDescriptor(AParcel* parcel, int fd) { |
| ParcelFileDescriptor parcelFd((unique_fd(fd))); |
| |
| status_t status = parcel->get()->writeParcelable(parcelFd); |
| |
| // ownership is retained by caller |
| (void)parcelFd.release().release(); |
| |
| return PruneStatusT(status); |
| } |
| |
| binder_status_t AParcel_readParcelFileDescriptor(const AParcel* parcel, int* fd) { |
| ParcelFileDescriptor parcelFd; |
| // status_t status = parcelFd.readFromParcel(parcel->get()); |
| status_t status = parcel->get()->readParcelable(&parcelFd); |
| if (status != STATUS_OK) return PruneStatusT(status); |
| |
| *fd = parcelFd.release().release(); |
| return STATUS_OK; |
| } |
| |
| binder_status_t AParcel_writeStatusHeader(AParcel* parcel, const AStatus* status) { |
| return PruneStatusT(status->get()->writeToParcel(parcel->get())); |
| } |
| binder_status_t AParcel_readStatusHeader(const AParcel* parcel, AStatus** status) { |
| ::android::binder::Status bstatus; |
| binder_status_t ret = PruneStatusT(bstatus.readFromParcel(*parcel->get())); |
| if (ret == EX_NONE) { |
| *status = new AStatus(std::move(bstatus)); |
| } |
| return ret; |
| } |
| |
| binder_status_t AParcel_writeString(AParcel* parcel, const char* string, size_t length) { |
| const uint8_t* str8 = (uint8_t*)string; |
| |
| const ssize_t len16 = utf8_to_utf16_length(str8, length); |
| |
| if (len16 < 0 || len16 >= std::numeric_limits<int32_t>::max()) { |
| LOG(WARNING) << __func__ << ": Invalid string length: " << len16; |
| return STATUS_BAD_VALUE; |
| } |
| |
| status_t err = parcel->get()->writeInt32(len16); |
| if (err) { |
| return PruneStatusT(err); |
| } |
| |
| void* str16 = parcel->get()->writeInplace((len16 + 1) * sizeof(char16_t)); |
| if (str16 == nullptr) { |
| return STATUS_NO_MEMORY; |
| } |
| |
| utf8_to_utf16(str8, length, (char16_t*)str16, (size_t)len16 + 1); |
| |
| return STATUS_OK; |
| } |
| |
| binder_status_t AParcel_readString(const AParcel* parcel, AParcel_stringReallocator reallocator, |
| AParcel_stringGetter getter, void** stringData) { |
| size_t len16; |
| const char16_t* str16 = parcel->get()->readString16Inplace(&len16); |
| |
| if (str16 == nullptr) { |
| LOG(WARNING) << __func__ << ": Failed to read string in place."; |
| return STATUS_UNEXPECTED_NULL; |
| } |
| |
| ssize_t len8; |
| |
| if (len16 == 0) { |
| len8 = 1; |
| } else { |
| len8 = utf16_to_utf8_length(str16, len16) + 1; |
| } |
| |
| if (len8 <= 0 || len8 >= std::numeric_limits<int32_t>::max()) { |
| LOG(WARNING) << __func__ << ": Invalid string length: " << len8; |
| return STATUS_BAD_VALUE; |
| } |
| |
| *stringData = reallocator(*stringData, len8); |
| |
| if (*stringData == nullptr) { |
| return STATUS_NO_MEMORY; |
| } |
| |
| char* str8 = getter(*stringData); |
| |
| if (str8 == nullptr) { |
| LOG(WARNING) << __func__ << ": AParcel_stringReallocator failed to allocate."; |
| return STATUS_NO_MEMORY; |
| } |
| |
| utf16_to_utf8(str16, len16, str8, len8); |
| |
| return STATUS_OK; |
| } |
| |
| // See gen_parcel_helper.py. These auto-generated read/write methods use the same types for |
| // libbinder and this library. |
| // @START |
| binder_status_t AParcel_writeInt32(AParcel* parcel, int32_t value) { |
| status_t status = parcel->get()->writeInt32(value); |
| return PruneStatusT(status); |
| } |
| |
| binder_status_t AParcel_writeUint32(AParcel* parcel, uint32_t value) { |
| status_t status = parcel->get()->writeUint32(value); |
| return PruneStatusT(status); |
| } |
| |
| binder_status_t AParcel_writeInt64(AParcel* parcel, int64_t value) { |
| status_t status = parcel->get()->writeInt64(value); |
| return PruneStatusT(status); |
| } |
| |
| binder_status_t AParcel_writeUint64(AParcel* parcel, uint64_t value) { |
| status_t status = parcel->get()->writeUint64(value); |
| return PruneStatusT(status); |
| } |
| |
| binder_status_t AParcel_writeFloat(AParcel* parcel, float value) { |
| status_t status = parcel->get()->writeFloat(value); |
| return PruneStatusT(status); |
| } |
| |
| binder_status_t AParcel_writeDouble(AParcel* parcel, double value) { |
| status_t status = parcel->get()->writeDouble(value); |
| return PruneStatusT(status); |
| } |
| |
| binder_status_t AParcel_writeBool(AParcel* parcel, bool value) { |
| status_t status = parcel->get()->writeBool(value); |
| return PruneStatusT(status); |
| } |
| |
| binder_status_t AParcel_writeChar(AParcel* parcel, char16_t value) { |
| status_t status = parcel->get()->writeChar(value); |
| return PruneStatusT(status); |
| } |
| |
| binder_status_t AParcel_writeByte(AParcel* parcel, int8_t value) { |
| status_t status = parcel->get()->writeByte(value); |
| return PruneStatusT(status); |
| } |
| |
| binder_status_t AParcel_readInt32(const AParcel* parcel, int32_t* value) { |
| status_t status = parcel->get()->readInt32(value); |
| return PruneStatusT(status); |
| } |
| |
| binder_status_t AParcel_readUint32(const AParcel* parcel, uint32_t* value) { |
| status_t status = parcel->get()->readUint32(value); |
| return PruneStatusT(status); |
| } |
| |
| binder_status_t AParcel_readInt64(const AParcel* parcel, int64_t* value) { |
| status_t status = parcel->get()->readInt64(value); |
| return PruneStatusT(status); |
| } |
| |
| binder_status_t AParcel_readUint64(const AParcel* parcel, uint64_t* value) { |
| status_t status = parcel->get()->readUint64(value); |
| return PruneStatusT(status); |
| } |
| |
| binder_status_t AParcel_readFloat(const AParcel* parcel, float* value) { |
| status_t status = parcel->get()->readFloat(value); |
| return PruneStatusT(status); |
| } |
| |
| binder_status_t AParcel_readDouble(const AParcel* parcel, double* value) { |
| status_t status = parcel->get()->readDouble(value); |
| return PruneStatusT(status); |
| } |
| |
| binder_status_t AParcel_readBool(const AParcel* parcel, bool* value) { |
| status_t status = parcel->get()->readBool(value); |
| return PruneStatusT(status); |
| } |
| |
| binder_status_t AParcel_readChar(const AParcel* parcel, char16_t* value) { |
| status_t status = parcel->get()->readChar(value); |
| return PruneStatusT(status); |
| } |
| |
| binder_status_t AParcel_readByte(const AParcel* parcel, int8_t* value) { |
| status_t status = parcel->get()->readByte(value); |
| return PruneStatusT(status); |
| } |
| |
| binder_status_t AParcel_writeInt32Array(AParcel* parcel, const int32_t* value, size_t length) { |
| return WriteArray<int32_t>(parcel, value, length); |
| } |
| |
| binder_status_t AParcel_writeUint32Array(AParcel* parcel, const uint32_t* value, size_t length) { |
| return WriteArray<uint32_t>(parcel, value, length); |
| } |
| |
| binder_status_t AParcel_writeInt64Array(AParcel* parcel, const int64_t* value, size_t length) { |
| return WriteArray<int64_t>(parcel, value, length); |
| } |
| |
| binder_status_t AParcel_writeUint64Array(AParcel* parcel, const uint64_t* value, size_t length) { |
| return WriteArray<uint64_t>(parcel, value, length); |
| } |
| |
| binder_status_t AParcel_writeFloatArray(AParcel* parcel, const float* value, size_t length) { |
| return WriteArray<float>(parcel, value, length); |
| } |
| |
| binder_status_t AParcel_writeDoubleArray(AParcel* parcel, const double* value, size_t length) { |
| return WriteArray<double>(parcel, value, length); |
| } |
| |
| binder_status_t AParcel_writeBoolArray(AParcel* parcel, const void* arrayData, |
| AParcel_boolArrayGetter getter, size_t length) { |
| return WriteArray<bool>(parcel, arrayData, getter, length, &Parcel::writeBool); |
| } |
| |
| binder_status_t AParcel_writeCharArray(AParcel* parcel, const char16_t* value, size_t length) { |
| return WriteArray<char16_t>(parcel, value, length); |
| } |
| |
| binder_status_t AParcel_writeByteArray(AParcel* parcel, const int8_t* value, size_t length) { |
| return WriteArray<int8_t>(parcel, value, length); |
| } |
| |
| binder_status_t AParcel_readInt32Array(const AParcel* parcel, void** arrayData, |
| AParcel_arrayReallocator reallocator, |
| AParcel_int32ArrayGetter getter) { |
| return ReadArray<int32_t>(parcel, arrayData, reallocator, getter); |
| } |
| |
| binder_status_t AParcel_readUint32Array(const AParcel* parcel, void** arrayData, |
| AParcel_arrayReallocator reallocator, |
| AParcel_uint32ArrayGetter getter) { |
| return ReadArray<uint32_t>(parcel, arrayData, reallocator, getter); |
| } |
| |
| binder_status_t AParcel_readInt64Array(const AParcel* parcel, void** arrayData, |
| AParcel_arrayReallocator reallocator, |
| AParcel_int64ArrayGetter getter) { |
| return ReadArray<int64_t>(parcel, arrayData, reallocator, getter); |
| } |
| |
| binder_status_t AParcel_readUint64Array(const AParcel* parcel, void** arrayData, |
| AParcel_arrayReallocator reallocator, |
| AParcel_uint64ArrayGetter getter) { |
| return ReadArray<uint64_t>(parcel, arrayData, reallocator, getter); |
| } |
| |
| binder_status_t AParcel_readFloatArray(const AParcel* parcel, void** arrayData, |
| AParcel_arrayReallocator reallocator, |
| AParcel_floatArrayGetter getter) { |
| return ReadArray<float>(parcel, arrayData, reallocator, getter); |
| } |
| |
| binder_status_t AParcel_readDoubleArray(const AParcel* parcel, void** arrayData, |
| AParcel_arrayReallocator reallocator, |
| AParcel_doubleArrayGetter getter) { |
| return ReadArray<double>(parcel, arrayData, reallocator, getter); |
| } |
| |
| binder_status_t AParcel_readBoolArray(const AParcel* parcel, void** arrayData, |
| AParcel_arrayReallocator reallocator, |
| AParcel_boolArraySetter setter) { |
| return ReadArray<bool>(parcel, arrayData, reallocator, setter, &Parcel::readBool); |
| } |
| |
| binder_status_t AParcel_readCharArray(const AParcel* parcel, void** arrayData, |
| AParcel_arrayReallocator reallocator, |
| AParcel_charArrayGetter getter) { |
| return ReadArray<char16_t>(parcel, arrayData, reallocator, getter); |
| } |
| |
| binder_status_t AParcel_readByteArray(const AParcel* parcel, void** arrayData, |
| AParcel_arrayReallocator reallocator, |
| AParcel_byteArrayGetter getter) { |
| return ReadArray<int8_t>(parcel, arrayData, reallocator, getter); |
| } |
| |
| // @END |