public static Dialog InitSipCall(DialogInfo dialogInfo, EventHandler <DialogState> stateChanged = null)
{
var dlg = new Dialog(Guid.NewGuid() + "@" + dialogInfo.LocalEndpoint, dialogInfo.RemoteEndpoint, dialogInfo.LocalEndpoint.Port, stateChanged);
var invite = new InviteMessage(dlg.CallId, dialogInfo.To, dialogInfo.From, dialogInfo.From);
dialogInfo.Fill(invite);
var localEp = dialogInfo.LocalRtpEndpoint ?? dialogInfo.LocalEndpoint;
localEp = new IPEndPoint(localEp.Address, MediaGateway.GetNextPort());
// TODO: select which codec will be used based on 183 session progress or prack
dlg.rtp = new RtpStream(localEp, MediaGateway.CreateMedia(MediaGateway.AudioCodec.G711Alaw));
var availableCodecs = MediaGateway.GetRegisteredCodecs().Select(MediaCodecDescriptor.Describe).ToList();
var parameters = availableCodecs.SelectMany(a => a.Parameters).ToList();
invite.SdpData = new Sdp();
invite.SdpData.AddParameter("o", string.Format("- {0} 0 IN IP4 {1}", Interlocked.Increment(ref sdpIds), localEp.Address))
.AddParameter("s", "-")
.AddParameter("c", string.Format("IN IP4 {0}", localEp.Address))
.AddParameter("t", "0 0")
.AddParameter("m", string.Format("audio {0} RTP/AVP {1}", localEp.Port, string.Join(" ", availableCodecs.SelectMany(a => a.Identifiers).OrderBy(a => a))));
foreach (var kvp in parameters)
{
invite.SdpData.AddParameter(kvp.Key, kvp.Value);
}
invite.SdpData.AddParameter("a", "sendrecv");
invite.Headers["Via"] = string.Format("SIP/2.0/UDP {0}:{2};rport;branch=z9hG4bK7fe{1}", dialogInfo.LocalEndpoint.Address, DateTime.Now.Ticks.ToString("X8").ToLowerInvariant(), dlg.sipPort);
invite.Headers["CSeq"] = Interlocked.Increment(ref dlg.callSequence) + " INVITE";
dlg.WaitForMessage(invite, dlg.HandleInviteResponse, 100, 500, 1000, 2000, 5000);
dlg.Send(invite);
dlg.stateChanged(dlg, DialogState.Dialing);
return(dlg);
}
public static void Main(string[] args)
{
var sessionName = (System.Environment.GetEnvironmentVariable("SESSIONNAME") ?? string.Empty).ToLower();
var isRdp = sessionName.StartsWith("rdp") || sessionName.StartsWith("console");
Console.WriteLine("IsRdp? {0}. {1}", isRdp, System.Environment.GetEnvironmentVariable("SESSIONNAME"));
IRecordingDevice recordingDevice;
if (isRdp)
{
recordingDevice = new DummyRecordDevice();
Console.WriteLine("You're connected through rdp and will not be able to record audio");
}
else
{
recordingDevice = new NAudioRecordDevice();
}
MediaGateway.RegisterCodec(MediaGateway.AudioCodec.G711Alaw, () => new AlawMediaCodec(NAudioPlaybackDevice.Instance, recordingDevice));
DialogInfo dlg;
if (args.Length >= 4)
{
dlg = Configure(args[0], args[1], args[2], args[3], args.Length > 4 ? args[4] : null);
}
else if (args.Length == 0)
{
dlg = Configure();
}
else
{
Console.WriteLine("usage: sipStack.exe <source_ip> <source_number> <destination_number> <destination_ip>");
return;
}
EventHandler <DialogState> stateHandler = (sender, state) =>
{
Console.WriteLine("state is {0}", state);
if (state == DialogState.Hungup)
{
recordingDevice.Stop();
}
};
var dialog = Dialog.InitSipCall(dlg, stateHandler);
do
{
var r = Console.ReadKey();
if (r.Key == ConsoleKey.W)
{
dialog.Hangup();
break;
// TODO: send bye
}
Digit d;
// ReSharper disable once SwitchStatementMissingSomeCases
switch (r.Key)
{
case ConsoleKey.D0:
d = Digit.Zero;
break;
case ConsoleKey.D1:
d = Digit.One;
break;
case ConsoleKey.D2:
d = Digit.Two;
break;
case ConsoleKey.D3:
d = Digit.Three;
break;
case ConsoleKey.D4:
d = Digit.Four;
break;
case ConsoleKey.D5:
d = Digit.Five;
break;
case ConsoleKey.D6:
d = Digit.Six;
break;
case ConsoleKey.D7:
d = Digit.Seven;
break;
case ConsoleKey.D8:
d = Digit.Eight;
break;
case ConsoleKey.D9:
d = Digit.Nine;
break;
case ConsoleKey.A:
d = Digit.A;
break;
case ConsoleKey.B:
d = Digit.B;
break;
case ConsoleKey.C:
d = Digit.C;
break;
case ConsoleKey.D:
d = Digit.D;
break;
case ConsoleKey.H:
d = Digit.Hash;
break;
case ConsoleKey.S:
d = Digit.Star;
break;
default:
continue;
}
recordingDevice.PlayDtmf(d, 320);
Thread.Sleep(320);
}while (true);
}