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/*
* Copyright (C) 2022 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.
*/
package android.net.nsd;
import android.annotation.NonNull;
import android.net.mdns.aidl.DiscoveryInfo;
import android.net.mdns.aidl.GetAddressInfo;
import android.net.mdns.aidl.IMDns;
import android.net.mdns.aidl.IMDnsEventListener;
import android.net.mdns.aidl.RegistrationInfo;
import android.net.mdns.aidl.ResolutionInfo;
import android.os.RemoteException;
import android.os.ServiceSpecificException;
import android.util.Log;
/**
* A manager class for mdns service.
*
* @hide
*/
public class MDnsManager {
private static final String TAG = MDnsManager.class.getSimpleName();
private final IMDns mMdns;
/** Service name for this. */
public static final String MDNS_SERVICE = "mdns";
private static final int NO_RESULT = -1;
private static final int NETID_UNSET = 0;
public MDnsManager(IMDns mdns) {
mMdns = mdns;
}
/**
* Start the MDNSResponder daemon.
*/
public void startDaemon() {
try {
mMdns.startDaemon();
} catch (RemoteException | ServiceSpecificException e) {
Log.e(TAG, "Start mdns failed.", e);
}
}
/**
* Stop the MDNSResponder daemon.
*/
public void stopDaemon() {
try {
mMdns.stopDaemon();
} catch (RemoteException | ServiceSpecificException e) {
Log.e(TAG, "Stop mdns failed.", e);
}
}
/**
* Start registering a service.
*
* @param id The operation ID.
* @param serviceName The service name to be registered.
* @param registrationType The service type to be registered.
* @param port The port on which the service accepts connections.
* @param txtRecord The txt record. Refer to {@code NsdServiceInfo#setTxtRecords} for details.
* @param interfaceIdx The interface index on which to register the service.
* @return {@code true} if registration is successful, else {@code false}.
*/
public boolean registerService(int id, @NonNull String serviceName,
@NonNull String registrationType, int port, @NonNull byte[] txtRecord,
int interfaceIdx) {
final RegistrationInfo info = new RegistrationInfo(id, NO_RESULT, serviceName,
registrationType, port, txtRecord, interfaceIdx);
try {
mMdns.registerService(info);
} catch (RemoteException | ServiceSpecificException e) {
Log.e(TAG, "Register service failed.", e);
return false;
}
return true;
}
/**
* Start discovering services.
*
* @param id The operation ID.
* @param registrationType The service type to be discovered.
* @param interfaceIdx The interface index on which to discover for services.
* @return {@code true} if discovery is started successfully, else {@code false}.
*/
public boolean discover(int id, @NonNull String registrationType, int interfaceIdx) {
final DiscoveryInfo info = new DiscoveryInfo(id, NO_RESULT, "" /* serviceName */,
registrationType, "" /* domainName */, interfaceIdx, NETID_UNSET);
try {
mMdns.discover(info);
} catch (RemoteException | ServiceSpecificException e) {
Log.e(TAG, "Discover service failed.", e);
return false;
}
return true;
}
/**
* Start resolving the target service.
*
* @param id The operation ID.
* @param serviceName The service name to be resolved.
* @param registrationType The service type to be resolved.
* @param domain The service domain to be resolved.
* @param interfaceIdx The interface index on which to resolve the service.
* @return {@code true} if resolution is started successfully, else {@code false}.
*/
public boolean resolve(int id, @NonNull String serviceName, @NonNull String registrationType,
@NonNull String domain, int interfaceIdx) {
final ResolutionInfo info = new ResolutionInfo(id, NO_RESULT, serviceName,
registrationType, domain, "" /* serviceFullName */, "" /* hostname */, 0 /* port */,
new byte[0] /* txtRecord */, interfaceIdx);
try {
mMdns.resolve(info);
} catch (RemoteException | ServiceSpecificException e) {
Log.e(TAG, "Resolve service failed.", e);
return false;
}
return true;
}
/**
* Start getting the target service address.
*
* @param id The operation ID.
* @param hostname The fully qualified domain name of the host to be queried for.
* @param interfaceIdx The interface index on which to issue the query.
* @return {@code true} if getting address is started successful, else {@code false}.
*/
public boolean getServiceAddress(int id, @NonNull String hostname, int interfaceIdx) {
final GetAddressInfo info = new GetAddressInfo(id, NO_RESULT, hostname,
"" /* address */, interfaceIdx, NETID_UNSET);
try {
mMdns.getServiceAddress(info);
} catch (RemoteException | ServiceSpecificException e) {
Log.e(TAG, "Get service address failed.", e);
return false;
}
return true;
}
/**
* Stop an operation which was requested before.
*
* @param id the operation id to be stopped.
* @return {@code true} if operation is stopped successfully, else {@code false}.
*/
public boolean stopOperation(int id) {
try {
mMdns.stopOperation(id);
} catch (RemoteException | ServiceSpecificException e) {
Log.e(TAG, "Stop operation failed.", e);
return false;
}
return true;
}
/**
* Register an event listener.
*
* @param listener The listener to be registered.
*/
public void registerEventListener(@NonNull IMDnsEventListener listener) {
try {
mMdns.registerEventListener(listener);
} catch (RemoteException | ServiceSpecificException e) {
Log.e(TAG, "Register listener failed.", e);
}
}
/**
* Unregister an event listener.
*
* @param listener The listener to be unregistered.
*/
public void unregisterEventListener(@NonNull IMDnsEventListener listener) {
try {
mMdns.unregisterEventListener(listener);
} catch (RemoteException | ServiceSpecificException e) {
Log.e(TAG, "Unregister listener failed.", e);
}
}
}
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