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