89 lines
2.3 KiB
C++
89 lines
2.3 KiB
C++
/*
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* Copyright (C) 2009 The Android Open Source Project
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*
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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 <stdint.h>
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#include <utils/Log.h>
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#include <binder/IPCThreadState.h>
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#include <binder/IServiceManager.h>
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#include <binder/Permission.h>
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namespace android {
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// ---------------------------------------------------------------------------
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Permission::Permission(char const* name)
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: mPermissionName(name), mPid(getpid())
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{
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}
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Permission::Permission(const String16& name)
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: mPermissionName(name), mPid(getpid())
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{
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}
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Permission::Permission(const Permission& rhs)
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: mPermissionName(rhs.mPermissionName),
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mGranted(rhs.mGranted),
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mPid(rhs.mPid)
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{
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}
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Permission::~Permission()
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{
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}
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bool Permission::operator < (const Permission& rhs) const
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{
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return mPermissionName < rhs.mPermissionName;
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}
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bool Permission::checkCalling() const
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{
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IPCThreadState* ipcState = IPCThreadState::self();
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pid_t pid = ipcState->getCallingPid();
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uid_t uid = ipcState->getCallingUid();
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return doCheckPermission(pid, uid);
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}
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bool Permission::check(pid_t pid, uid_t uid) const
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{
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return doCheckPermission(pid, uid);
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}
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bool Permission::doCheckPermission(pid_t pid, uid_t uid) const
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{
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if ((uid == 0) || (pid == mPid)) {
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// root and ourselves is always okay
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return true;
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} else {
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// see if we already granted this permission for this uid
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Mutex::Autolock _l(mLock);
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if (mGranted.indexOf(uid) >= 0)
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return true;
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}
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bool granted = checkPermission(mPermissionName, pid, uid);
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if (granted) {
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Mutex::Autolock _l(mLock);
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// no need to check again, the old item will be replaced if it is
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// already there.
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mGranted.add(uid);
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}
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return granted;
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}
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// ---------------------------------------------------------------------------
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}; // namespace android
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