/// <summary>
/// Attempts to establish a new VoIP call via the Google Voice gateway.
/// </summary>
/// <param name="destination">The destination number to call.</param>
public void Call(string destination)
{
if (!_isBound)
{
throw new ApplicationException("The Google Voice call could not proceed as the XMPP client is not bound.");
}
else
{
_audioChannel = new AudioChannel();
// Call to Google Voice over XMPP & Gingle (Google's version of Jingle).
XMPPPhoneSession phoneSession = m_xmppClient.GetPhoneSession();
m_xmppCall = m_xmppClient.GetPhoneSession();
m_xmppCall.Accepted += XMPPAnswered;
m_xmppCall.Rejected += XMPPCallFailed;
m_xmppCall.Hungup += Hangup;
// Create the SDP packet to send to GV. Customise it with the ICE credentials that GV require.
SDP xmppSDP = _audioChannel.GetSDP(true);
xmppSDP.IcePwd = Crypto.GetRandomString(12);
m_localSTUNUFrag = Crypto.GetRandomString(8);
xmppSDP.IceUfrag = m_localSTUNUFrag;
m_xmppCall.PlaceCall(destination + "@" + GOOGLE_VOICE_HOST, xmppSDP);
}
}
private static void XMPPPlaceCall(SIPServerUserAgent uas)
{
if (!uas.IsCancelled)
{
XMPPPhoneSession phoneSession = m_xmppClient.GetPhoneSession();
SIPToXMPPCall call = new SIPToXMPPCall(uas, phoneSession, m_sipTransport, m_ipAddress);
m_activeCalls.Add(uas.CallRequest.Header.CallId, call);
call.Call(uas.CallRequest.URI.User);
}
}
public SIPToXMPPCall(SIPServerUserAgent uas, XMPPPhoneSession xmppCall, SIPTransport sipTransport, IPAddress ipAddress)
{
m_uas = uas;
m_xmppCall = xmppCall;
m_sipTransport = sipTransport;
m_ipAddress = ipAddress;
m_uas.CallCancelled += SIPCallCancelled;
m_xmppCall.Accepted += Answered;
m_xmppCall.Rejected += CallFailed;
m_xmppCall.Hungup += Hangup;
}