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136 lines
4.5 KiB
136 lines
4.5 KiB
/* |
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* Copyright (C) 2010 The Android Open Source Project |
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* Copyright (C) 2012-2014, The Linux Foundation. All rights reserved. |
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* |
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* Not a Contribution, Apache license notifications and license are |
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* retained for attribution purposes only. |
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* Licensed under the Apache License, Version 2.0 (the "License"); |
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* you may not use this file except in compliance with the License. |
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* You may obtain a copy of the License at |
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* |
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* http://www.apache.org/licenses/LICENSE-2.0 |
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* |
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* Unless required by applicable law or agreed to in writing, software |
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* distributed under the License is distributed on an "AS IS" BASIS, |
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
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* See the License for the specific language governing permissions and |
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* limitations under the License. |
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*/ |
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#include <fcntl.h> |
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#include <stdint.h> |
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#include <sys/types.h> |
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#include <binder/Parcel.h> |
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#include <binder/IBinder.h> |
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#include <binder/IInterface.h> |
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#include <binder/IPCThreadState.h> |
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#include <utils/Errors.h> |
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#include <private/android_filesystem_config.h> |
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#include <IQService.h> |
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#define QSERVICE_DEBUG 0 |
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using namespace android; |
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using namespace qClient; |
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// --------------------------------------------------------------------------- |
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namespace qService { |
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class BpQService : public BpInterface<IQService> |
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{ |
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public: |
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BpQService(const sp<IBinder>& impl) |
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: BpInterface<IQService>(impl) {} |
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virtual void connect(const sp<IQClient>& client) { |
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ALOGD_IF(QSERVICE_DEBUG, "%s: connect client", __FUNCTION__); |
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Parcel data, reply; |
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data.writeInterfaceToken(IQService::getInterfaceDescriptor()); |
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data.writeStrongBinder(IInterface::asBinder(client)); |
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remote()->transact(CONNECT, data, &reply); |
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} |
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virtual android::status_t dispatch(uint32_t command, const Parcel* inParcel, |
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Parcel* outParcel) { |
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ALOGD_IF(QSERVICE_DEBUG, "%s: dispatch in:%p", __FUNCTION__, inParcel); |
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status_t err = (status_t) android::FAILED_TRANSACTION; |
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Parcel data; |
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Parcel *reply = outParcel; |
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data.writeInterfaceToken(IQService::getInterfaceDescriptor()); |
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if (inParcel && inParcel->dataSize() > 0) |
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data.appendFrom(inParcel, 0, inParcel->dataSize()); |
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err = remote()->transact(command, data, reply); |
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return err; |
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} |
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}; |
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IMPLEMENT_META_INTERFACE(QService, "android.display.IQService"); |
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// ---------------------------------------------------------------------- |
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static void getProcName(int pid, char *buf, int size); |
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status_t BnQService::onTransact( |
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uint32_t code, const Parcel& data, Parcel* reply, uint32_t flags) |
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{ |
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ALOGD_IF(QSERVICE_DEBUG, "%s: code: %d", __FUNCTION__, code); |
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// IPC should be from certain processes only |
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IPCThreadState* ipc = IPCThreadState::self(); |
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const int callerPid = ipc->getCallingPid(); |
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const int callerUid = ipc->getCallingUid(); |
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const int MAX_BUF_SIZE = 1024; |
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char callingProcName[MAX_BUF_SIZE] = {0}; |
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getProcName(callerPid, callingProcName, MAX_BUF_SIZE); |
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const bool permission = (callerUid == AID_MEDIA || |
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callerUid == AID_GRAPHICS || |
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callerUid == AID_ROOT || |
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callerUid == AID_SYSTEM); |
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if (code == CONNECT) { |
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CHECK_INTERFACE(IQService, data, reply); |
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if(callerUid != AID_GRAPHICS) { |
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ALOGE("display.qservice CONNECT access denied: \ |
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pid=%d uid=%d process=%s", |
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callerPid, callerUid, callingProcName); |
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return PERMISSION_DENIED; |
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} |
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sp<IQClient> client = |
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interface_cast<IQClient>(data.readStrongBinder()); |
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connect(client); |
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return NO_ERROR; |
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} else if (code > COMMAND_LIST_START && code < COMMAND_LIST_END) { |
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if(!permission) { |
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ALOGE("display.qservice access denied: command=%d\ |
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pid=%d uid=%d process=%s", code, callerPid, |
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callerUid, callingProcName); |
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return PERMISSION_DENIED; |
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} |
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CHECK_INTERFACE(IQService, data, reply); |
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dispatch(code, &data, reply); |
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return NO_ERROR; |
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} else { |
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return BBinder::onTransact(code, data, reply, flags); |
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} |
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} |
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//Helper |
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static void getProcName(int pid, char *buf, int size) { |
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int fd = -1; |
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snprintf(buf, size, "/proc/%d/cmdline", pid); |
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fd = open(buf, O_RDONLY); |
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if (fd < 0) { |
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strlcpy(buf, "Unknown", size); |
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} else { |
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ssize_t len = read(fd, buf, size - 1); |
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if (len >= 0) |
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buf[len] = 0; |
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close(fd); |
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} |
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} |
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}; // namespace qService
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