| public Progress ( SIPResponseStatusCodesEnum progressStatus, string reasonPhrase, string customHeaders, string progressContentType, string progressBody ) : void | ||
| progressStatus | SIPResponseStatusCodesEnum | |
| reasonPhrase | string | |
| customHeaders | string | |
| progressContentType | string | |
| progressBody | string | |
| return | void | |
/// <summary>
/// This method can be used to start the processing of a new incoming call request.
/// The user agent will is acting as a server for this operation and it can be considered
/// the opposite of the Call method. This is only the first step in answering an incoming
/// call. It can still be rejected or answered after this point.
/// </summary>
/// <param name="inviteRequest">The invite request representing the incoming call.</param>
/// <returns>An ID string that needs to be supplied when the call is answered or rejected
/// (used to manage multiple pending incoming calls).</returns>
public SIPServerUserAgent AcceptCall(SIPRequest inviteRequest)
{
UASInviteTransaction uasTransaction = new UASInviteTransaction(m_transport, inviteRequest, m_outboundProxy);
SIPServerUserAgent uas = new SIPServerUserAgent(m_transport, m_outboundProxy, null, null, SIPCallDirection.In, null, null, null, uasTransaction);
uas.CallCancelled += (pendingUas) =>
{
CallEnded();
ServerCallCancelled?.Invoke(pendingUas);
};
uas.Progress(SIPResponseStatusCodesEnum.Trying, null, null, null, null);
uas.Progress(SIPResponseStatusCodesEnum.Ringing, null, null, null, null);
return(uas);
}
/// <summary>
/// This method can be used to start the processing of a new incoming call request.
/// The user agent will is acting as a server for this operation and it can be considered
/// the opposite of the Call method.
/// </summary>
/// <param name="uasInviteTx">The invite transaction representing the incoming call.</param>
/// <returns>True if the call is accepted, false otherwise.</returns>
public bool AcceptCall(UASInviteTransaction uasInviteTx)
{
SIPServerUserAgent uas = new SIPServerUserAgent(m_transport, m_outboundProxy, null, null, SIPCallDirection.In, null, null, null, uasInviteTx);
uas.Progress(SIPResponseStatusCodesEnum.Trying, null, null, null, null);
// TODO: Decide how to deal with multiple simultaneous calls.
if (m_uas != null)
{
uas.Reject(SIPResponseStatusCodesEnum.BusyHere, null, null);
return(false);
}
else
{
uas.Progress(SIPResponseStatusCodesEnum.Ringing, null, null, null, null);
m_uas = uas;
return(true);
}
}
/// <summary>
/// Handler for processing incoming SIP requests.
/// </summary>
/// <param name="localSIPEndPoint">The end point the request was received on.</param>
/// <param name="remoteEndPoint">The end point the request came from.</param>
/// <param name="sipRequest">The SIP request received.</param>
private void SIPTransportRequestReceived(SIPEndPoint localSIPEndPoint, SIPEndPoint remoteEndPoint, SIPRequest sipRequest)
{
if (sipRequest.Method == SIPMethodsEnum.BYE)
{
if (m_uac != null && m_uac.SIPDialogue != null && sipRequest.Header.CallId == m_uac.SIPDialogue.CallId)
{
// Call has been hungup by remote end.
StatusMessage("Call hungup by remote end.");
SIPNonInviteTransaction byeTransaction = m_sipTransport.CreateNonInviteTransaction(sipRequest, remoteEndPoint, localSIPEndPoint, null);
SIPResponse byeResponse = SIPTransport.GetResponse(sipRequest, SIPResponseStatusCodesEnum.Ok, null);
byeTransaction.SendFinalResponse(byeResponse);
CallFinished();
}
else if (m_uas != null && m_uas.SIPDialogue != null && sipRequest.Header.CallId == m_uas.SIPDialogue.CallId)
{
// Call has been hungup by remote end.
StatusMessage("Call hungup.");
SIPNonInviteTransaction byeTransaction = m_sipTransport.CreateNonInviteTransaction(sipRequest, remoteEndPoint, localSIPEndPoint, null);
SIPResponse byeResponse = SIPTransport.GetResponse(sipRequest, SIPResponseStatusCodesEnum.Ok, null);
byeTransaction.SendFinalResponse(byeResponse);
CallFinished();
}
else
{
logger.Debug("Unmatched BYE request received for " + sipRequest.URI.ToString() + ".");
SIPResponse noCallLegResponse = SIPTransport.GetResponse(sipRequest, SIPResponseStatusCodesEnum.CallLegTransactionDoesNotExist, null);
m_sipTransport.SendResponse(noCallLegResponse);
}
}
else if (sipRequest.Method == SIPMethodsEnum.INVITE)
{
StatusMessage("Incoming call request: " + localSIPEndPoint + "<-" + remoteEndPoint + " " + sipRequest.URI.ToString() + ".");
UASInviteTransaction uasTransaction = m_sipTransport.CreateUASTransaction(sipRequest, remoteEndPoint, localSIPEndPoint, null);
m_uas = new SIPServerUserAgent(m_sipTransport, null, null, null, SIPCallDirection.In, null, null, null, uasTransaction);
m_uas.CallCancelled += UASCallCancelled;
m_uas.Progress(SIPResponseStatusCodesEnum.Trying, null, null, null, null);
m_uas.Progress(SIPResponseStatusCodesEnum.Ringing, null, null, null, null);
IncomingCall();
}
else if (sipRequest.Method == SIPMethodsEnum.CANCEL)
{
UASInviteTransaction inviteTransaction = (UASInviteTransaction)m_sipTransport.GetTransaction(SIPTransaction.GetRequestTransactionId(sipRequest.Header.Vias.TopViaHeader.Branch, SIPMethodsEnum.INVITE));
if (inviteTransaction != null)
{
StatusMessage("Call was cancelled by remote end.");
SIPCancelTransaction cancelTransaction = m_sipTransport.CreateCancelTransaction(sipRequest, remoteEndPoint, localSIPEndPoint, inviteTransaction);
cancelTransaction.GotRequest(localSIPEndPoint, remoteEndPoint, sipRequest);
}
else
{
logger.Debug("No matching transaction was found for CANCEL to " + sipRequest.URI.ToString() + ".");
SIPResponse noCallLegResponse = SIPTransport.GetResponse(sipRequest, SIPResponseStatusCodesEnum.CallLegTransactionDoesNotExist, null);
m_sipTransport.SendResponse(noCallLegResponse);
}
CallFinished();
}
else
{
logger.Debug("SIP " + sipRequest.Method + " request received but no processing has been set up for it, rejecting.");
SIPResponse notAllowedResponse = SIPTransport.GetResponse(sipRequest, SIPResponseStatusCodesEnum.MethodNotAllowed, null);
m_sipTransport.SendResponse(notAllowedResponse);
}
}