1/*
2 * Copyright (C) 2016 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 *      http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17#define LOG_TAG "Netd"
18
19#include "EventReporter.h"
20#include "log/log.h"
21
22using android::interface_cast;
23using android::net::metrics::INetdEventListener;
24
25int EventReporter::setMetricsReportingLevel(const int level) {
26    if (level < INetdEventListener::REPORTING_LEVEL_NONE
27            || level > INetdEventListener::REPORTING_LEVEL_FULL) {
28        ALOGE("Invalid metrics reporting level %d", level);
29        return -EINVAL;
30    }
31    mReportingLevel = level;
32    return 0;
33}
34
35int EventReporter::getMetricsReportingLevel() const {
36    return mReportingLevel;
37}
38
39android::sp<INetdEventListener> EventReporter::getNetdEventListener() {
40    std::lock_guard<std::mutex> lock(mutex);
41    if (mNetdEventListener == nullptr) {
42        // Use checkService instead of getService because getService waits for 5 seconds for the
43        // service to become available. The DNS resolver inside netd is started much earlier in the
44        // boot sequence than the framework DNS listener, and we don't want to delay all DNS lookups
45        // for 5 seconds until the DNS listener starts up.
46        android::sp<android::IBinder> b = android::defaultServiceManager()->checkService(
47                android::String16("netd_listener"));
48        if (b != nullptr) {
49            mNetdEventListener = interface_cast<INetdEventListener>(b);
50        }
51    }
52    // If the netd listener service is dead, the binder call will just return an error, which should
53    // be fine because the only impact is that we can't log netd events. In any case, this should
54    // only happen if the system server is going down, which means it will shortly be taking us down
55    // with it.
56    return mNetdEventListener;
57}
58