private PushChannel AChannel(int queuedEventCount)
{
var channelEvents = new ChannelEvents();
var theChannel = Substitute.For<PushChannel>();
theChannel.Events.Returns(channelEvents);
theChannel.QueuedNotificationCount.Returns(queuedEventCount);
return theChannel;
}
/// <summary>
/// Bridge a new channel to the existing one. Generally used to route an incoming call to one or more endpoints.
/// </summary>
/// <remarks>
/// See https://freeswitch.org/confluence/display/FREESWITCH/bridge
/// </remarks>
/// <param name="uuid">The UUID of the channel to bridge (the A-Leg).</param>
/// <param name="endpoint">The destination to dial.</param>
/// <param name="options">(Optional) Any <seealso cref="BridgeOptions"/> to configure the bridge.</param>
/// <returns>A Task of <seealso cref="BridgeResult"/>.</returns>
public async Task <BridgeResult> Bridge(string uuid, string endpoint, BridgeOptions options = null)
{
if (options == null)
{
options = new BridgeOptions();
}
if (string.IsNullOrEmpty(options.UUID))
{
options.UUID = Guid.NewGuid().ToString();
}
var bridgeString = string.Format("{0}{1}", options, endpoint);
// some bridge options need to be set in channel vars
if (options.ChannelVariables.Any())
{
await
this.SetMultipleChannelVariables(
uuid, options.ChannelVariables.Select(kvp => kvp.Key + "='" + kvp.Value + "'").ToArray()).ConfigureAwait(false);
}
/* If the bridge fails to connect we'll get a CHANNEL_EXECUTE_COMPLETE event with a failure message and the Execute task will complete.
* If the bridge succeeds, that event won't arrive until after the bridged leg hangs up and completes the call.
* In this case, we want to return a result as soon as the b-leg picks up and connects so we'll merge with the CHANNEL_BRIDGE event
* observable.Amb(otherObservable) will propogate the first sequence to produce a result. */
await SubscribeEvents(EventName.ChannelBridge, EventName.ChannelHangup).ConfigureAwait(false);
var bridgedOrHungupEvent =
ChannelEvents.FirstOrDefaultAsync(x => x.UUID == uuid && (x.EventName == EventName.ChannelBridge || x.EventName == EventName.ChannelHangup))
.Do(
e =>
{
if (e != null)
{
switch (e.EventName)
{
case EventName.ChannelBridge:
Console.WriteLine("Bridge [{0} - {1}] complete - {2}".Fmt(uuid, options.UUID, e.Headers[HeaderNames.OtherLegUniqueId]));
break;
case EventName.ChannelHangup:
Console.WriteLine("Bridge [{0} - {1}] aborted, channel hangup [{2}]".Fmt(uuid, options.UUID, e.Headers[HeaderNames.HangupCause]));
break;
}
}
});
return
(await
ExecuteApplication(uuid, "bridge", bridgeString)
.ToObservable()
.Amb(bridgedOrHungupEvent)
.Select(x => new BridgeResult(x))
.ToTask()
.ConfigureAwait(false));
}
public void VirtualChannelOpenEvent(int openHandle, ChannelEvents Event, IntPtr pData, int dataLength, uint totalLength, ChannelFlags dataFlags)
{
Debug.Print(DateTime.Now + " " + Environment.MachineName + ": VirtualChannelOpenEvent: " + Event);
switch (Event)
{
case ChannelEvents.DataReceived:
var data = new byte[dataLength];
Marshal.Copy(pData, data, 0, dataLength);
switch (dataFlags & ChannelFlags.Only)
{
case ChannelFlags.Only:
MessageReceived(ChannelMessage.FromByteArray(data));
break;
case ChannelFlags.First:
memoryStream = new MemoryStream((int)totalLength);
memoryStream.Write(data, 0, data.Length);
break;
case ChannelFlags.Middle:
if (memoryStream != null)
{
memoryStream.Write(data, 0, data.Length);
}
break;
case ChannelFlags.Last:
if (memoryStream != null)
{
memoryStream.Write(data, 0, data.Length);
memoryStream.Position = 0;
MessageReceived(ChannelMessage.FromStream(memoryStream));
memoryStream = null;
}
break;
}
break;
case ChannelEvents.WriteCanceled:
case ChannelEvents.WriteComplete:
/*
* The VirtualChannelWrite function is asynchronous. When the write operation has been completed,
* your VirtualChannelOpenEvent function receives a CHANNEL_EVENT_WRITE_COMPLETE notification.
* Until that notification is received, the caller must not free or reuse the pData buffer passed to VirtualChannelWrite
*/
Marshal.FreeHGlobal(pData);
break;
}
}
public void GivenAQueueBalancer()
{
var channelEvents = new ChannelEvents();
this.eventsProxy = new ChannelEvents();
this.eventsProxy.OnChannelCreated += this.eventsProxyOnChannelCreated;
var channelFactory = Substitute.For<ChannelFactory>();
var channel = Substitute.For<PushChannel>();
channel.Events.Returns(channelEvents);
channelFactory.Create().Returns(channel);
this.balancer = new QueueLengthLoadBalancer(channelFactory, this.eventsProxy, PlatformType.None);
this.balancer.AddChannels(5);
}
public void WhenBalancerIsShutdown()
{
var channelEvents = new ChannelEvents();
this.eventsProxy = new ChannelEvents();
var channelFactory = Substitute.For<ChannelFactory>();
this.theChannel = Substitute.For<PushChannel>();
this.theChannel.Events.Returns(channelEvents);
channelFactory.Create().Returns(this.theChannel);
this.balancer = new QueueLengthLoadBalancer(channelFactory, this.eventsProxy, PlatformType.None);
this.balancer.AddChannels(1);
this.balancer.ShutdownAll(true);
}
public void WhenTwoChannelsAreRemoved()
{
var channelEvents = new ChannelEvents();
this.eventsProxy = new ChannelEvents();
this.eventsProxy.OnChannelDestroyed += this.EventsProxyOnChannelDestroyed;
var channelFactory = Substitute.For<ChannelFactory>();
var channel = Substitute.For<PushChannel>();
channel.Events.Returns(channelEvents);
channelFactory.Create().Returns(channel);
this.balancer = new QueueLengthLoadBalancer(channelFactory, this.eventsProxy, PlatformType.None);
this.balancer.AddChannels(3);
this.balancer.RemoveChannels(5);
}
public void VirtualChannelOpenEvent(int openHandle,
ChannelEvents Event, byte[] data,
int dataLength, uint totalLength, ChannelFlags dataFlags)
{
DataChannelEventArgs args = new DataChannelEventArgs()
{
Data = data,
DataFlags = dataFlags,
DataLength = dataLength,
Event = Event,
OpenHandle = openHandle,
TotalLength = totalLength
};
OnDataChannelEvent(args);
}
public Base(Negotiation.Base parent, Message.Negotiation.Parameters parameters, UnityAction <Base> disconnection_handler)
{
this.parent = parent;
this.parameters = parameters;
events = new ChannelEvents();
events.onDisconnectedHandler = new ChannelEvents.DisonnectionHandlerCallback();
events.onDisconnectedHandler.AddListener(disconnection_handler);
sendResult = null;
sendQueue = new Queue <Threads.Task>();
stopEvent = new ManualResetEvent(false);
addEvent = new ManualResetEvent(false);
worker = new Threads.Thread(Worker);
}
public void WhenBalancerIsShutdown()
{
this.eventsProxy = new ChannelEvents();
var channelFactory = Substitute.For<ChannelFactory>();
this.GivenAnEmptyChannel();
this.GivenABusyChannel();
channelFactory.Create().Returns(this.theEmptyChannel, theBusyChannel);
this.balancer = new QueueLengthLoadBalancer(channelFactory, this.eventsProxy, PlatformType.None);
this.theNotification = Substitute.For<Notification>();
this.balancer.AddChannels(2);
this.balancer.Distribute(this.theNotification);
}
private void VirtualChannelInitEventProc(IntPtr initHandle, ChannelEvents Event, byte[] data, int dataLength)
{
Debug.Print(DateTime.Now + " " + Environment.MachineName + ": VirtualChannelInitEventProc: " + Event);
switch (Event)
{
case ChannelEvents.Initialized:
break;
case ChannelEvents.Connected:
var ret = entryPoints.VirtualChannelOpen(initHandle, ref OpenChannel, ChannelMessage.ChannelName, channelOpenEventDelegate);
if (ret != ChannelReturnCodes.Ok)
{
MessageBox.Show("TSTunnels: Open of RDP virtual channel failed.\n" + ret, "Error", MessageBoxButtons.OK, MessageBoxIcon.Error);
}
else
{
/*main = new frmMain(entryPoints, OpenChannel);
* main.Show();
* main.Hide();
* string servername = System.Text.Encoding.Unicode.GetString(data);
* servername = servername.Substring(0, servername.IndexOf('\0'));
* main.Text = "TS addin in C#: " + servername;*/
}
break;
case ChannelEvents.V1Connected:
MessageBox.Show("TSTunnels: Connecting to a non Windows 2000 Terminal Server.", "Error", MessageBoxButtons.OK, MessageBoxIcon.Error);
break;
case ChannelEvents.Disconnected:
//main.RealClosing = true;
//main.Close();
break;
case ChannelEvents.Terminated:
break;
}
}
public void VirtualChannelInitEventProc(IntPtr initHandle,
ChannelEvents Event, byte[] data, int dataLength)
{
switch (Event)
{
case ChannelEvents.Initialized:
break;
case ChannelEvents.Connected:
ChannelReturnCodes ret = _entryPoints.VirtualChannelOpen(
initHandle, ref _openChannel,
_channelName, _channelOpenEventDelegate);
if (ret != ChannelReturnCodes.Ok)
{
throw new VirtualChannelException(String.Format("TsClientAddIn ({0}): Couldn't open communcation channel for battery monitor.", _channelName));
}
else
{
string servername = System.Text.Encoding.Unicode.GetString(data);
_serverName = servername.Substring(0, servername.IndexOf('\0'));
}
break;
case ChannelEvents.V1Connected:
throw new VirtualChannelException(String.Format("TsClientAddIn ({0}): Connecting to a Terminal Server that doesn't support data communication.", _channelName));
case ChannelEvents.Disconnected:
break;
case ChannelEvents.Terminated:
GC.KeepAlive(_channelInitEventDelegate);
GC.KeepAlive(_channelOpenEventDelegate);
GC.KeepAlive(_entryPoints);
GC.Collect();
GC.WaitForPendingFinalizers();
break;
}
}
public PushService()
{
this.Events = new ChannelEvents();
}
/// <summary>
/// Register a callback to be invoked when the given Channel UUID hangs up.
/// </summary>
/// <param name="uuid">The Channel UUID.</param>
/// <param name="action">A Callback to be invoked on hangup.</param>
public void OnHangup(string uuid, Action <EventMessage> action)
{
ChannelEvents.Where(x => x.UUID == uuid && x.EventName == EventName.ChannelHangup).Take(1).Subscribe(action);
}
/// <summary>
/// Asynchronously executes a dialplan application on the given channel.
/// </summary>
/// <remarks>
/// See https://freeswitch.org/confluence/display/FREESWITCH/mod_dptools
/// </remarks>
/// <param name="uuid">The channel UUID.</param>
/// <param name="application">The dialplan application to execute.</param>
/// <param name="applicationArguments">(Optional) arguments to pass to the application.</param>
/// <param name="eventLock">(Default: false) Whether to block the socket until the application completes before processing further.
/// (see https://wiki.freeswitch.org/wiki/Event_Socket_Outbound#Q:_Ordering_and_async_keyword )</param>
/// <param name="async">(Default: false) Whether to return control from the application immediately.
/// (see https://wiki.freeswitch.org/wiki/Event_Socket_Outbound#Q:_Should_I_use_sync_mode_or_async_mode.3F)
/// </param>
/// <param name="loops">(Optional) How many times to repeat the application.</param>
/// <returns>
/// A Task of <seealso cref="EventMessage"/> that wraps the ChannelExecuteComplete event if the application completes successfully.
/// The Task result will be null if the application did not execute, for example, the socket disconnected or the channel was hung up.
/// </returns>
public Task <ChannelEvent> ExecuteApplication(
string uuid, string application, string applicationArguments = null, bool eventLock = false, bool async = false, int loops = 1)
{
if (uuid == null)
{
throw new ArgumentNullException("uuid");
}
if (application == null)
{
throw new ArgumentNullException("application");
}
//lists.freeswitch.org/pipermail/freeswitch-users/2013-May/095329.html
var applicationUUID = Guid.NewGuid().ToString();
var sb = StringBuilderPool.Allocate();
sb.AppendFormat("sendmsg {0}\nEvent-UUID: {1}\ncall-command: execute\nexecute-app-name: {2}\n", uuid, applicationUUID, application);
if (eventLock)
{
sb.Append("event-lock: true\n");
}
if (loops > 1)
{
sb.Append("loops: " + loops + "\n");
}
if (async)
{
sb.Append("async: true\n");
}
if (applicationArguments != null)
{
sb.AppendFormat("content-type: text/plain\ncontent-length: {0}\n\n{1}\n", applicationArguments.Length, applicationArguments);
}
var tcs = new TaskCompletionSource <ChannelEvent>();
var subscriptions = new CompositeDisposable();
if (cts.Token.CanBeCanceled)
{
subscriptions.Add(cts.Token.Register(() => tcs.TrySetCanceled()));
}
subscriptions.Add(
ChannelEvents.Where(
x => x.EventName == EventName.ChannelExecuteComplete && x.Headers["Application-UUID"] == applicationUUID)
.Take(1)
.Subscribe(
executeCompleteEvent =>
{
if (executeCompleteEvent != null)
{
Console.WriteLine("{0} ChannelExecuteComplete [{1} {2} {3}]".Fmt(
executeCompleteEvent.UUID,
executeCompleteEvent.AnswerState,
executeCompleteEvent.Headers[HeaderNames.Application],
executeCompleteEvent.Headers[HeaderNames.ApplicationResponse]));
}
else
{
Console.WriteLine("No ChannelExecuteComplete event received for {0}".Fmt(application));
}
tcs.TrySetResult(executeCompleteEvent);
},
ex => tcs.TrySetException(ex),
subscriptions.Dispose));
SubscribeEvents(EventName.ChannelExecuteComplete).ContinueWith(t =>
{
if (t.IsCompleted)
{
SendCommand(StringBuilderPool.ReturnAndFree(sb))
.Then(reply =>
{
if (!reply.Success)
{
tcs.TrySetResult(null);
}
})
.ContinueOnFaultedOrCancelled(tcs, subscriptions.Dispose);
}
else
{
tcs.TrySetException(t.Exception);
}
});
return(tcs.Task);
}
