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/*
* Copyright (C) 2015 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.
*/
//#define LOG_NDEBUG 0
#define LOG_TAG "DrmSessionManager"
#include <utils/Log.h>
#include <aidl/android/media/IResourceManagerClient.h>
#include <aidl/android/media/IResourceManagerService.h>
#include <aidl/android/media/MediaResourceParcel.h>
#include <android/binder_ibinder.h>
#include <android/binder_manager.h>
#include <cutils/properties.h>
#include <mediadrm/DrmUtils.h>
#include <mediadrm/DrmSessionManager.h>
#include <unistd.h>
#include <utils/String8.h>
#include <vector>
namespace android {
using aidl::android::media::MediaResourceParcel;
namespace {
void ResourceManagerServiceDied(void* cookie) {
auto thiz = static_cast<DrmSessionManager*>(cookie);
thiz->binderDied();
}
}
using ::ndk::ScopedAStatus;
static String8 GetSessionIdString(const Vector<uint8_t> &sessionId) {
String8 sessionIdStr;
for (size_t i = 0; i < sessionId.size(); ++i) {
sessionIdStr.appendFormat("%u ", sessionId[i]);
}
return sessionIdStr;
}
template <typename Byte = uint8_t>
static std::vector<Byte> toStdVec(const Vector<uint8_t> &vector) {
auto v = reinterpret_cast<const Byte *>(vector.array());
std::vector<Byte> vec(v, v + vector.size());
return vec;
}
static std::vector<MediaResourceParcel> toResourceVec(
const Vector<uint8_t> &sessionId, int64_t value) {
using Type = aidl::android::media::MediaResourceType;
using SubType = aidl::android::media::MediaResourceSubType;
std::vector<MediaResourceParcel> resources;
MediaResourceParcel resource{
Type::kDrmSession, SubType::kUnspecifiedSubType,
toStdVec<int8_t>(sessionId), value};
resources.push_back(resource);
return resources;
}
static std::shared_ptr<IResourceManagerService> getResourceManagerService() {
::ndk::SpAIBinder binder(AServiceManager_getService("media.resource_manager"));
return IResourceManagerService::fromBinder(binder);
}
bool isEqualSessionId(const Vector<uint8_t> &sessionId1, const Vector<uint8_t> &sessionId2) {
if (sessionId1.size() != sessionId2.size()) {
return false;
}
for (size_t i = 0; i < sessionId1.size(); ++i) {
if (sessionId1[i] != sessionId2[i]) {
return false;
}
}
return true;
}
sp<DrmSessionManager> DrmSessionManager::Instance() {
static sp<DrmSessionManager> drmSessionManager = new DrmSessionManager();
drmSessionManager->init();
return drmSessionManager;
}
DrmSessionManager::DrmSessionManager()
: DrmSessionManager(getResourceManagerService()) {
}
DrmSessionManager::DrmSessionManager(const std::shared_ptr<IResourceManagerService> &service)
: mService(service),
mInitialized(false),
mDeathRecipient(AIBinder_DeathRecipient_new(ResourceManagerServiceDied)) {
if (mService == NULL) {
ALOGE("Failed to init ResourceManagerService");
}
}
DrmSessionManager::~DrmSessionManager() {
if (mService != NULL) {
AIBinder_unlinkToDeath(mService->asBinder().get(), mDeathRecipient.get(), this);
}
}
void DrmSessionManager::init() {
Mutex::Autolock lock(mLock);
if (mInitialized) {
return;
}
mInitialized = true;
if (mService != NULL) {
AIBinder_linkToDeath(mService->asBinder().get(), mDeathRecipient.get(), this);
}
}
void DrmSessionManager::addSession(int pid,
const std::shared_ptr<IResourceManagerClient>& drm, const Vector<uint8_t> &sessionId) {
uid_t uid = AIBinder_getCallingUid();
ALOGV("addSession(pid %d, uid %d, drm %p, sessionId %s)", pid, uid, drm.get(),
GetSessionIdString(sessionId).string());
Mutex::Autolock lock(mLock);
if (mService == NULL) {
return;
}
static int64_t clientId = 0;
mSessionMap[toStdVec(sessionId)] = (SessionInfo){pid, uid, clientId};
mService->addResource(pid, uid, clientId++, drm, toResourceVec(sessionId, INT64_MAX));
}
void DrmSessionManager::useSession(const Vector<uint8_t> &sessionId) {
ALOGV("useSession(%s)", GetSessionIdString(sessionId).string());
Mutex::Autolock lock(mLock);
auto it = mSessionMap.find(toStdVec(sessionId));
if (mService == NULL || it == mSessionMap.end()) {
return;
}
auto info = it->second;
mService->addResource(info.pid, info.uid, info.clientId, NULL, toResourceVec(sessionId, -1));
}
void DrmSessionManager::removeSession(const Vector<uint8_t> &sessionId) {
ALOGV("removeSession(%s)", GetSessionIdString(sessionId).string());
Mutex::Autolock lock(mLock);
auto it = mSessionMap.find(toStdVec(sessionId));
if (mService == NULL || it == mSessionMap.end()) {
return;
}
auto info = it->second;
// removeClient instead of removeSession because each client has only one session
mService->removeClient(info.pid, info.clientId);
mSessionMap.erase(it);
}
bool DrmSessionManager::reclaimSession(int callingPid) {
ALOGV("reclaimSession(%d)", callingPid);
// unlock early because reclaimResource might callback into removeSession
mLock.lock();
std::shared_ptr<IResourceManagerService> service(mService);
mLock.unlock();
if (service == NULL) {
return false;
}
// cannot update mSessionMap because we do not know which sessionId is reclaimed;
// we rely on IResourceManagerClient to removeSession in reclaimResource
Vector<uint8_t> dummy;
bool success;
ScopedAStatus status = service->reclaimResource(callingPid, toResourceVec(dummy, INT64_MAX), &success);
return status.isOk() && success;
}
size_t DrmSessionManager::getSessionCount() const {
Mutex::Autolock lock(mLock);
return mSessionMap.size();
}
bool DrmSessionManager::containsSession(const Vector<uint8_t>& sessionId) const {
Mutex::Autolock lock(mLock);
return mSessionMap.count(toStdVec(sessionId));
}
void DrmSessionManager::binderDied() {
ALOGW("ResourceManagerService died.");
Mutex::Autolock lock(mLock);
mService.reset();
}
} // namespace android
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