private static DialogInfo Configure(string sourceIp, string sourceNumber, string destinationNumber, string destinationIp, string originalCalledNumber)
{
var dlg = new DialogInfo
{
From = sourceNumber + "@" + sourceIp,
To = destinationNumber + "@" + destinationIp,
LocalEndpoint = new IPEndPoint(IPAddress.Parse(sourceIp), 5060),
RemoteEndpoint = new IPEndPoint(IPAddress.Parse(destinationIp), 5060)
};
if (!string.IsNullOrWhiteSpace(originalCalledNumber))
{
dlg.OriginalCalledNumber = new Contact(originalCalledNumber);
}
return(dlg);
}
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);
}