/*
* Copyright (c) 2016 Samsung Electronics Co., Ltd All Rights Reserved
*
* 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.
*/
using System;
namespace Tizen.Network.Nsd
{
///
/// This class is used for managing the network service discovery using SSDP.
///
/// 4
public class SsdpBrowser : INsdBrowser
{
private string _target;
private uint _browserHandle;
private event EventHandler _serviceFound;
private Interop.Nsd.Ssdp.ServiceFoundCallback _serviceFoundCallback;
///
/// This event is raised when the service has become available or unavailable during a service discovery using SSDP.
///
/// 4
public event EventHandler ServiceFound
{
add
{
_serviceFound += value;
}
remove
{
_serviceFound -= value;
}
}
///
/// A public constructor for the SsdpBrowser class to create a SsdpBrowser instance for the given target.
///
/// 4
/// The target to browse for the service.
/// http://tizen.org/feature/network.service_discovery.ssdp
/// Thrown when the target is null.
/// Thrown when SSDP is not supported.
public SsdpBrowser(string target)
{
SsdpInitializer ssdpInit = Globals.s_threadSsd.Value;
Log.Info(Globals.LogTag, "Initialize ThreadLocal instance = " + ssdpInit);
if (target == null)
{
Log.Debug(Globals.LogTag, "target is null");
NsdErrorFactory.ThrowSsdpException((int)SsdpError.InvalidParameter);
}
_target = target;
}
///
/// Starts browsing the SSDP remote service.
///
///
/// If there are any services available, the ServiceFound event will be invoked.
/// The application will keep browsing for the available or unavailable services until it calls StopDiscovery().
///
/// 4
/// http://tizen.org/feature/network.service_discovery.ssdp
/// Thrown when any other error occured.
/// Thrown when SSDP is not supported.
public void StartDiscovery()
{
SsdpInitializer ssdpInit = Globals.s_threadSsd.Value;
Log.Info(Globals.LogTag, "Initialize ThreadLocal instance = " + ssdpInit);
_serviceFoundCallback = (SsdpServiceState state, uint service, IntPtr userData) =>
{
if (_serviceFound != null)
{
Log.Info(Globals.LogTag, "Inside Service found callback");
SsdpService ssdpService = new SsdpService(service);
_serviceFound(null, new SsdpServiceFoundEventArgs(state, ssdpService));
}
};
int ret = Interop.Nsd.Ssdp.StartBrowsing(_target, out _browserHandle, _serviceFoundCallback, IntPtr.Zero);
if (ret != (int)SsdpError.None)
{
Log.Error(Globals.LogTag, "Failed to discover Ssdp remote service, Error - " + (SsdpError)ret);
NsdErrorFactory.ThrowSsdpException(ret);
}
}
///
/// Stops browsing the SSDP remote service.
///
/// 4
/// http://tizen.org/privilege/internet
/// http://tizen.org/feature/network.service_discovery.ssdp
/// Thrown when any other error occured.
/// Thrown when SSDP is not supported.
/// Thrown when the permission is denied.
public void StopDiscovery()
{
int ret = Interop.Nsd.Ssdp.StopBrowsing(_browserHandle);
if (ret != (int)SsdpError.None)
{
Log.Error(Globals.LogTag, "Failed to stop discovery of Ssdp remote service, Error - " + (SsdpError)ret);
NsdErrorFactory.ThrowSsdpException(ret);
}
}
}
}