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/*
* 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.
*/
#define STATSD_DEBUG false // STOPSHIP if true
#include "Log.h"
#include "SubscriberReporter.h"
using std::lock_guard;
namespace android {
namespace os {
namespace statsd {
using std::vector;
void SubscriberReporter::broadcastSubscriberDied(void* rawPir) {
SubscriberReporter& thiz = getInstance();
// Erase the mapping from a (config_key, subscriberId) to a pir if the
// mapping exists. This requires iterating over the map, but this operation
// should be rare and the map is expected to be small.
lock_guard<mutex> lock(thiz.mLock);
for (auto subscriberMapIt = thiz.mIntentMap.begin(); subscriberMapIt != thiz.mIntentMap.end();
subscriberMapIt++) {
unordered_map<int64_t, shared_ptr<IPendingIntentRef>>& subscriberMap =
subscriberMapIt->second;
for (auto pirIt = subscriberMap.begin(); pirIt != subscriberMap.end(); pirIt++) {
if (pirIt->second.get() == rawPir) {
subscriberMap.erase(pirIt);
if (subscriberMap.empty()) {
thiz.mIntentMap.erase(subscriberMapIt);
}
// pirIt and subscriberMapIt are now invalid.
return;
}
}
}
}
SubscriberReporter::SubscriberReporter() :
mBroadcastSubscriberDeathRecipient(AIBinder_DeathRecipient_new(broadcastSubscriberDied)) {
}
void SubscriberReporter::setBroadcastSubscriber(const ConfigKey& configKey,
int64_t subscriberId,
const shared_ptr<IPendingIntentRef>& pir) {
VLOG("SubscriberReporter::setBroadcastSubscriber called with configKey %s and subscriberId "
"%lld.",
configKey.ToString().c_str(), (long long)subscriberId);
{
lock_guard<mutex> lock(mLock);
mIntentMap[configKey][subscriberId] = pir;
}
// Pass the raw binder pointer address to be the cookie of the death recipient. While the death
// notification is fired, the cookie is used for identifying which binder was died. Because
// the NDK binder doesn't pass dead binder pointer to binder death handler, the binder death
// handler can't know who died.
// If a dedicated cookie is used to store metadata (config key, subscriber id) for direct
// lookup, a data structure is needed manage the cookies.
AIBinder_linkToDeath(pir->asBinder().get(), mBroadcastSubscriberDeathRecipient.get(),
pir.get());
}
void SubscriberReporter::unsetBroadcastSubscriber(const ConfigKey& configKey,
int64_t subscriberId) {
VLOG("SubscriberReporter::unsetBroadcastSubscriber called.");
lock_guard<mutex> lock(mLock);
auto subscriberMapIt = mIntentMap.find(configKey);
if (subscriberMapIt != mIntentMap.end()) {
subscriberMapIt->second.erase(subscriberId);
if (subscriberMapIt->second.empty()) {
mIntentMap.erase(configKey);
}
}
}
void SubscriberReporter::alertBroadcastSubscriber(const ConfigKey& configKey,
const Subscription& subscription,
const MetricDimensionKey& dimKey) const {
// Reminder about ids:
// subscription id - name of the Subscription (that ties the Alert to the broadcast)
// subscription rule_id - the name of the Alert (that triggers the broadcast)
// subscriber_id - name of the PendingIntent to use to send the broadcast
// config uid - the uid that uploaded the config (and therefore gave the PendingIntent,
// although the intent may be to broadcast to a different uid)
// config id - the name of this config (for this particular uid)
VLOG("SubscriberReporter::alertBroadcastSubscriber called.");
lock_guard<mutex> lock(mLock);
if (!subscription.has_broadcast_subscriber_details()
|| !subscription.broadcast_subscriber_details().has_subscriber_id()) {
ALOGE("Broadcast subscriber does not have an id.");
return;
}
int64_t subscriberId = subscription.broadcast_subscriber_details().subscriber_id();
vector<string> cookies;
cookies.reserve(subscription.broadcast_subscriber_details().cookie_size());
for (auto& cookie : subscription.broadcast_subscriber_details().cookie()) {
cookies.push_back(cookie);
}
auto it1 = mIntentMap.find(configKey);
if (it1 == mIntentMap.end()) {
ALOGW("Cannot inform subscriber for missing config key %s ", configKey.ToString().c_str());
return;
}
auto it2 = it1->second.find(subscriberId);
if (it2 == it1->second.end()) {
ALOGW("Cannot inform subscriber of config %s for missing subscriberId %lld ",
configKey.ToString().c_str(), (long long)subscriberId);
return;
}
sendBroadcastLocked(it2->second, configKey, subscription, cookies, dimKey);
}
void SubscriberReporter::sendBroadcastLocked(const shared_ptr<IPendingIntentRef>& pir,
const ConfigKey& configKey,
const Subscription& subscription,
const vector<string>& cookies,
const MetricDimensionKey& dimKey) const {
VLOG("SubscriberReporter::sendBroadcastLocked called.");
pir->sendSubscriberBroadcast(
configKey.GetUid(),
configKey.GetId(),
subscription.id(),
subscription.rule_id(),
cookies,
dimKey.getDimensionKeyInWhat().toStatsDimensionsValueParcel());
}
} // namespace statsd
} // namespace os
} // namespace android
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