/// <summary>
/// Attempts to place a new outgoing call.
/// </summary>
/// <param name="sipCallDescriptor">A call descriptor containing the information about how
/// and where to place the call.</param>
/// <param name="mediaSession">The media session used for this call</param>
public async Task InitiateCall(SIPCallDescriptor sipCallDescriptor, IMediaSession mediaSession)
{
m_uac = new SIPClientUserAgent(m_transport);
m_uac.CallTrying += ClientCallTryingHandler;
m_uac.CallRinging += ClientCallRingingHandler;
m_uac.CallAnswered += ClientCallAnsweredHandler;
m_uac.CallFailed += ClientCallFailedHandler;
SIPEndPoint serverEndPoint = m_uac.GetCallDestination(sipCallDescriptor);
if (serverEndPoint != null)
{
MediaSession = mediaSession;
MediaSession.SessionMediaChanged += MediaSessionOnSessionMediaChanged;
var sdp = await MediaSession.CreateOffer(serverEndPoint.Address).ConfigureAwait(false);
sipCallDescriptor.Content = sdp;
m_uac.Call(sipCallDescriptor);
}
else
{
ClientCallFailed?.Invoke(m_uac, $"Could not resolve destination when placing call to {sipCallDescriptor.Uri}.");
CallEnded();
}
}
/// <summary>
/// Attempts to place a new outgoing call.
/// </summary>
/// <param name="sipCallDescriptor">A call descriptor containing the information about how and where to place the call.</param>
public void Call(SIPCallDescriptor sipCallDescriptor)
{
m_uac = new SIPClientUserAgent(m_transport);
m_uac.CallTrying += ClientCallTryingHandler;
m_uac.CallRinging += ClientCallRingingHandler;
m_uac.CallAnswered += ClientCallAnsweredHandler;
m_uac.CallFailed += ClientCallFailedHandler;
m_uac.Call(sipCallDescriptor);
}
/// <summary>
/// Attempts to place a new outgoing call.
/// </summary>
/// <param name="sipCallDescriptor">A call descriptor containing the information about how
/// and where to place the call.</param>
/// <param name="mediaSession">The media session used for this call</param>
public async Task InitiateCallAsync(SIPCallDescriptor sipCallDescriptor, IMediaSession mediaSession)
{
m_cts = new CancellationTokenSource();
m_uac = new SIPClientUserAgent(m_transport);
m_uac.CallTrying += ClientCallTryingHandler;
m_uac.CallRinging += ClientCallRingingHandler;
m_uac.CallAnswered += ClientCallAnsweredHandler;
m_uac.CallFailed += ClientCallFailedHandler;
// Can be DNS lookups involved in getting the call destination.
SIPEndPoint serverEndPoint = await Task.Run <SIPEndPoint>(() => { return(m_uac.GetCallDestination(sipCallDescriptor)); }).ConfigureAwait(false);
if (serverEndPoint != null)
{
MediaSession = mediaSession;
MediaSession.OnRtpEvent += OnRemoteRtpEvent;
//MediaSession.OnRtpClosed += (reason) => Hangup();
MediaSession.OnRtpClosed += (reason) =>
{
if (!MediaSession.IsClosed)
{
logger.LogWarning($"RTP channel was closed with reason {reason}.");
}
};
RTCOfferOptions offerOptions = new RTCOfferOptions {
RemoteSignallingAddress = serverEndPoint.Address
};
var sdp = await mediaSession.createOffer(offerOptions).ConfigureAwait(false);
mediaSession.setLocalDescription(new RTCSessionDescription {
sdp = sdp, type = RTCSdpType.offer
});
if (mediaSession.localDescription == null)
{
ClientCallFailed?.Invoke(m_uac, $"Could not create a local SDP offer.");
CallEnded();
}
else
{
sipCallDescriptor.Content = mediaSession.localDescription.sdp.ToString();
// This initiates the call but does not wait for an answer.
m_uac.Call(sipCallDescriptor);
}
}
else
{
ClientCallFailed?.Invoke(m_uac, $"Could not resolve destination when placing call to {sipCallDescriptor.Uri}.");
CallEnded();
}
}
public SIPRequest Call(SIPCallDescriptor sipCallDescriptor, SIPEndPoint serverEndPoint)
{
m_uacCallDescriptor = sipCallDescriptor;
m_uac = new SIPClientUserAgent(m_sipTransport, m_outboundProxy);
m_uac.CallFailed += ClientCallFailed;
m_uac.CallTrying += (uac, resp) => CallTrying?.Invoke(uac, resp);
m_uac.CallRinging += (uac, resp) => CallRinging?.Invoke(uac, resp);
m_uac.CallAnswered += ClientCallAnswered;
return(m_uac.Call(m_uacCallDescriptor));
}
/// <summary>
/// The current call has ended. Reset the state of the user agent.
/// </summary>
private void CallEnded()
{
m_uac = null;
m_uas = null;
if (MediaSession != null && !MediaSession.IsClosed)
{
MediaSession.Close("normal");
MediaSession = null;
}
OnCallHungup?.Invoke();
}
/// <summary>
/// The current call has ended. Reset the state of the user agent.
/// </summary>
private void CallEnded()
{
m_uac = null;
m_uas = null;
if (MediaSession != null)
{
MediaSession.SessionMediaChanged -= MediaSessionOnSessionMediaChanged;
MediaSession.Close();
MediaSession = null;
}
OnCallHungup?.Invoke();
}
/// <summary>
/// Attempts to place a new outgoing call.
/// </summary>
/// <param name="sipCallDescriptor">A call descriptor containing the information about how
/// and where to place the call.</param>
/// <param name="mediaSession">The media session used for this call</param>
public async Task InitiateCallAsync(SIPCallDescriptor sipCallDescriptor, IMediaSession mediaSession)
{
m_cts = new CancellationTokenSource();
m_uac = new SIPClientUserAgent(m_transport);
m_uac.CallTrying += ClientCallTryingHandler;
m_uac.CallRinging += ClientCallRingingHandler;
m_uac.CallAnswered += ClientCallAnsweredHandler;
m_uac.CallFailed += ClientCallFailedHandler;
// Can be DNS lookups involved in getting the call destination.
SIPEndPoint serverEndPoint = await Task.Run <SIPEndPoint>(() => { return(m_uac.GetCallDestination(sipCallDescriptor)); }).ConfigureAwait(false);
if (serverEndPoint != null)
{
MediaSession = mediaSession;
MediaSession.OnRtpEvent += OnRemoteRtpEvent;
//MediaSession.OnRtpClosed += (reason) => Hangup();
MediaSession.OnRtpClosed += (reason) =>
{
if (!MediaSession.IsClosed)
{
logger.LogWarning($"RTP channel was closed with reason {reason}.");
}
};
var sdpAnnounceAddress = NetServices.GetLocalAddressForRemote(serverEndPoint.Address);
var sdp = mediaSession.CreateOffer(sdpAnnounceAddress);
if (sdp == null)
{
ClientCallFailed?.Invoke(m_uac, $"Could not generate an offer.", null);
CallEnded();
}
else
{
sipCallDescriptor.Content = sdp.ToString();
// This initiates the call but does not wait for an answer.
m_uac.Call(sipCallDescriptor);
}
}
else
{
ClientCallFailed?.Invoke(m_uac, $"Could not resolve destination when placing call to {sipCallDescriptor.Uri}.", null);
CallEnded();
}
}
public override void Start()
{
try
{
base.Start();
m_activeAppServerEntry = GetActiveAppServer();
if (m_activeAppServerEntry != null)
{
while (!m_stop)
{
Thread.Sleep(Convert.ToInt32(m_interval.TotalMilliseconds % Int32.MaxValue));
logger.Debug("AppServerDispatcher executing.");
m_startCheckTime.Reset();
m_startCheckTime.Start();
SIPClientUserAgent uac = new SIPClientUserAgent(m_sipTransport, null, null, null, LogMonitorEvent);
SIPCallDescriptor callDescriptor = new SIPCallDescriptor(null, null, m_activeAppServerEntry.AppServerURI.ToString(), null, null, null, null, null, SIPCallDirection.Out, null, null, null);
callDescriptor.MangleResponseSDP = false;
uac.CallFailed += CallFailed;
uac.CallAnswered += CallAnswered;
uac.Call(callDescriptor);
uac.ServerTransaction.CDR = null;
}
}
else
{
logger.Warn("No active app server could be set in AppServerDispatcher.Start, job stopping.");
}
}
catch (Exception excp)
{
logger.Error("Exception AppServerDispatcher StartJob. " + excp.Message);
}
}
public override void Start()
{
try
{
base.Start();
m_activeAppServerEntry = GetActiveAppServer();
if (m_activeAppServerEntry != null)
{
while (!m_stop)
{
Thread.Sleep(Convert.ToInt32(m_interval.TotalMilliseconds % Int32.MaxValue));
logger.Debug("AppServerDispatcher executing.");
m_startCheckTime.Reset();
m_startCheckTime.Start();
SIPClientUserAgent uac = new SIPClientUserAgent(m_sipTransport, null, null, null, LogMonitorEvent);
SIPCallDescriptor callDescriptor = new SIPCallDescriptor(null, null, m_activeAppServerEntry.AppServerURI.ToString(), null, null, null, null, null, SIPCallDirection.Out, null, null, null);
callDescriptor.MangleResponseSDP = false;
uac.CallFailed += CallFailed;
uac.CallAnswered += CallAnswered;
uac.Call(callDescriptor);
uac.ServerTransaction.CDR = null;
}
}
else
{
logger.Warn("No active app server could be set in AppServerDispatcher.Start, job stopping.");
}
}
catch (Exception excp)
{
logger.Error("Exception AppServerDispatcher StartJob. " + excp.Message);
}
}
private void FireCallTrying(SIPClientUserAgent uac, SIPResponse tryingResponse)
{
if (CallTrying != null)
{
CallTrying(uac, tryingResponse);
}
}
/// <summary>
/// Handler for when an in dialog request is received on an established call.
/// Typical types of request will be re-INVITES for things like putting a call on or
/// off hold and REFER requests for transfers. Some in dialog request types, such
/// as re-INVITES have specific events so they can be bubbled up to the
/// application to deal with.
/// </summary>
/// <param name="request">The in dialog request received.</param>
public async Task InDialogRequestReceivedAsync(SIPRequest sipRequest)
{
// Make sure the request matches our dialog and is not a stray.
// A dialog request should match on to tag, from tag and call ID. We'll be more
// accepting just in case the sender got the tags wrong.
if (Dialogue == null || sipRequest.Header.CallId != Dialogue.CallId)
{
var noCallLegResponse = SIPTransport.GetResponse(sipRequest, SIPResponseStatusCodesEnum.CallLegTransactionDoesNotExist, null);
var sendResult = await SendResponse(noCallLegResponse);
if (sendResult != SocketError.Success)
{
logger.LogWarning($"SIPUserAgent send response failed in InCallRequestReceivedAsync with {sendResult}.");
}
}
else
{
if (sipRequest.Method == SIPMethodsEnum.BYE)
{
logger.LogDebug($"Matching dialogue found for {sipRequest.StatusLine}.");
SIPNonInviteTransaction byeTransaction = m_transport.CreateNonInviteTransaction(sipRequest, m_outboundProxy);
SIPResponse byeResponse = SIPTransport.GetResponse(sipRequest, SIPResponseStatusCodesEnum.Ok, null);
byeTransaction.SendFinalResponse(byeResponse);
CallHungup?.Invoke();
m_uac = null;
m_uas = null;
}
else if (sipRequest.Method == SIPMethodsEnum.INVITE)
{
logger.LogDebug($"Re-INVITE request received {sipRequest.StatusLine}.");
UASInviteTransaction reInviteTransaction = m_transport.CreateUASTransaction(sipRequest, m_outboundProxy);
if (OnReinviteRequest == null)
{
// The application isn't prepared to accept re-INVITE requests. We'll reject as gently as we can to try and not lose the call.
SIPResponse notAcceptableResponse = SIPTransport.GetResponse(sipRequest, SIPResponseStatusCodesEnum.NotAcceptable, null);
reInviteTransaction.SendFinalResponse(notAcceptableResponse);
}
else
{
SIPResponse tryingResponse = SIPTransport.GetResponse(sipRequest, SIPResponseStatusCodesEnum.Trying, null);
reInviteTransaction.SendProvisionalResponse(tryingResponse);
OnReinviteRequest(reInviteTransaction);
}
}
else if (sipRequest.Method == SIPMethodsEnum.OPTIONS)
{
//Log_External(new SIPMonitorConsoleEvent(SIPMonitorServerTypesEnum.AppServer, SIPMonitorEventTypesEnum.DialPlan, "OPTIONS request for established dialogue " + dialogue.DialogueName + ".", dialogue.Owner));
SIPNonInviteTransaction optionsTransaction = m_transport.CreateNonInviteTransaction(sipRequest, m_outboundProxy);
SIPResponse okResponse = SIPTransport.GetResponse(sipRequest, SIPResponseStatusCodesEnum.Ok, null);
okResponse.Body = Dialogue.RemoteSDP;
okResponse.Header.ContentLength = okResponse.Body.Length;
okResponse.Header.ContentType = m_sdpContentType;
optionsTransaction.SendFinalResponse(okResponse);
}
else if (sipRequest.Method == SIPMethodsEnum.MESSAGE)
{
//Log_External(new SIPMonitorConsoleEvent(SIPMonitorServerTypesEnum.AppServer, SIPMonitorEventTypesEnum.DialPlan, "MESSAGE for call " + sipRequest.URI.ToString() + ": " + sipRequest.Body + ".", dialogue.Owner));
SIPNonInviteTransaction messageTransaction = m_transport.CreateNonInviteTransaction(sipRequest, m_outboundProxy);
SIPResponse okResponse = SIPTransport.GetResponse(sipRequest, SIPResponseStatusCodesEnum.Ok, null);
messageTransaction.SendFinalResponse(okResponse);
}
else if (sipRequest.Method == SIPMethodsEnum.REFER)
{
//Log_External(new SIPMonitorConsoleEvent(SIPMonitorServerTypesEnum.AppServer, SIPMonitorEventTypesEnum.DialPlan, "REFER received on dialogue " + dialogue.DialogueName + ", transfer mode is " + dialogue.TransferMode + ".", dialogue.Owner));
SIPNonInviteTransaction referTransaction = m_transport.CreateNonInviteTransaction(sipRequest, m_outboundProxy);
if (sipRequest.Header.ReferTo.IsNullOrBlank())
{
// A REFER request must have a Refer-To header.
//Log_External(new SIPMonitorConsoleEvent(SIPMonitorServerTypesEnum.AppServer, SIPMonitorEventTypesEnum.DialPlan, "Bad REFER request, no Refer-To header.", dialogue.Owner));
SIPResponse invalidResponse = SIPTransport.GetResponse(sipRequest, SIPResponseStatusCodesEnum.BadRequest, "Missing mandatory Refer-To header");
referTransaction.SendFinalResponse(invalidResponse);
}
else
{
//TODO: Add handling logic for indialog REFER requests.
}
}
}
}
private void FireCallFailed(SIPClientUserAgent uac, string errorMessage)
{
if (CallFailed != null)
{
CallFailed(uac, errorMessage);
}
}
private void FireCallRinging(SIPClientUserAgent uac, SIPResponse ringingResponse)
{
if (CallRinging != null)
{
CallRinging(uac, ringingResponse);
}
}
private void ProbeWorkers()
{
try
{
while (!m_exit)
{
Thread.Sleep(PROBE_WORKER_CALL_PERIOD);
try
{
SIPEndPoint activeWorkerEndPoint = GetFirstHealthyEndPoint();
if (activeWorkerEndPoint != null)
{
SIPCallDescriptor callDescriptor = new SIPCallDescriptor(m_dispatcherUsername, null, "sip:" + m_dispatcherUsername + "@" + activeWorkerEndPoint.GetIPEndPoint().ToString(),
"sip:" + m_dispatcherUsername + "@sipcalldispatcher", "sip:" + activeWorkerEndPoint.GetIPEndPoint().ToString(), null, null, null, SIPCallDirection.Out, null, null, null);
SIPClientUserAgent uac = new SIPClientUserAgent(m_sipTransport, null, null, null, null);
uac.CallFailed += new SIPCallFailedDelegate(AppServerCallFailed);
uac.CallAnswered += (call, sipResponse) =>
{
if (sipResponse.Status != SIPResponseStatusCodesEnum.BadExtension)
{
logger.Warn("Probe call answered with unexpected response code of " + sipResponse.StatusCode + ".");
AppServerCallFailed(call, "Unexpected response of " + ((int)sipResponse.StatusCode) + " on probe call.");
}
};
uac.Call(callDescriptor);
}
else
{
logger.Warn("SIPAppServerManager was not able to find a healthy app server endpoint.");
}
}
catch (Exception probeExcp)
{
logger.Error("Exception SIPAppServerManager Sending Probe. " + probeExcp.Message);
}
}
}
catch (Exception excp)
{
logger.Error("Exception SIPAppServerManager ProberWorkers. " + excp.Message);
}
}
private void PlaceCall(object state)
{
string callURI = (string)state;
/*m_dnsLookupComplete.Reset();
ThreadPool.QueueUserWorkItem(new WaitCallback(DNSLookup), callURI);
if (!m_dnsLookupComplete.WaitOne(DNS_LOOKUP_TIMEOUT)) {
AppendTraceMessage("DNS lookup for " + callURI + " timed out.\n");
ResetToCallStartState();
}
else {*/
AppendTraceMessage("Starting call to " + callURI + ".\n");
m_uac = new SIPClientUserAgent(m_sipTransport, null, null, null, LogTraceMessage);
m_uac.CallTrying += CallTrying;
m_uac.CallRinging += CallRinging;
m_uac.CallAnswered += CallAnswered;
m_uac.CallFailed += CallFailed;
SIPCallDescriptor callDescriptor = new SIPCallDescriptor("anonymous", null, callURI, null, null, null, null, null, SIPCallDirection.Out, null, null, null);
m_uac.Call(callDescriptor);
//}
}
/// <summary>
/// Sends the SIP INVITE probe request.
/// </summary>
public void SendProbe()
{
try
{
if (WorkerProcess == null)
{
logger.Debug("When attempting to send probe the worker process was null. Marking for immediate restart.");
NeedsImmediateRestart = true;
}
else if (WorkerProcess.HasExited)
{
logger.Debug("When attempting to send probe the worker had exited. Marking for immediate restart.");
NeedsImmediateRestart = true;
}
else if (m_probeUAC != null && !m_probeUAC.IsUACAnswered)
{
// A probe call has timed out.
m_probeUAC.Cancel();
m_missedProbes++;
if (m_missedProbes >= m_missedProbesLimit)
{
logger.Warn(m_missedProbes + " probes missed for " + AppServerEndpoint.ToString() + ". Marking for immediate restart.");
NeedsImmediateRestart = true;
}
}
if(!NeedsImmediateRestart && !NeedsToRestart)
{
m_probeCount++;
//logger.Debug("Sending probe " + m_probeCount + " to " + AppServerEndpoint.GetIPEndPoint().ToString() + ".");
DateTime probeSentAt = DateTime.Now;
SIPCallDescriptor callDescriptor = new SIPCallDescriptor(m_dispatcherUsername, null, "sip:" + m_dispatcherUsername + "@" + AppServerEndpoint.GetIPEndPoint().ToString(),
"sip:" + m_dispatcherUsername + "@sipcalldispatcher", "sip:" + AppServerEndpoint.GetIPEndPoint().ToString(), null, null, null, SIPCallDirection.Out, null, null, null);
m_probeUAC = new SIPClientUserAgent(m_sipTransport, null, null, null, null);
m_probeUAC.CallAnswered += (call, sipResponse) =>
{
//logger.Debug("Probe response received for " + AppServerEndpoint.ToString() + ".");
if (sipResponse.Status != SIPResponseStatusCodesEnum.BadExtension)
//if (sipResponse.Status != SIPResponseStatusCodesEnum.InternalServerError)
{
logger.Warn("Probe to " + AppServerEndpoint.ToString() + " answered incorrectly on probe number " + m_probeCount + " after "
+ DateTime.Now.Subtract(probeSentAt).TotalSeconds.ToString("0.##") + "s, unexpected response of " + ((int)sipResponse.StatusCode) + ".");
NeedsImmediateRestart = true;
}
else
{
m_gotInitialProbeResponse = true;
}
if (m_initialResponseMRE != null)
{
m_initialResponseMRE.Set();
}
};
m_probeUAC.Call(callDescriptor);
}
}
catch (Exception excp)
{
logger.Error("Exception SendProbe. " + excp.Message);
}
}
/// <summary>
/// Places an outgoing SIP call.
/// </summary>
/// <param name="destination">The SIP URI to place a call to. The destination can be a full SIP URI in which case the all will
/// be placed anonymously directly to that URI. Alternatively it can be just the user portion of a URI in which case it will
/// be sent to the configured SIP server.</param>
public void Call(MediaManager mediaManager, string destination)
{
_mediaManager = mediaManager;
_mediaManager.NewCall();
// Determine if this is a direct anonymous call or whether it should be placed using the pre-configured SIP server account.
SIPURI callURI = null;
string sipUsername = null;
string sipPassword = null;
string fromHeader = null;
if (destination.Contains("@") || m_sipServer == null)
{
// Anonymous call direct to SIP server specified in the URI.
callURI = SIPURI.ParseSIPURIRelaxed(destination);
}
else
{
// This call will use the pre-configured SIP account.
callURI = SIPURI.ParseSIPURIRelaxed(destination + "@" + m_sipServer);
sipUsername = m_sipUsername;
sipPassword = m_sipPassword;
fromHeader = (new SIPFromHeader(m_sipFromName, new SIPURI(m_sipUsername, m_sipServer, null), null)).ToString();
}
StatusMessage("Starting call to " + callURI.ToString() + ".");
m_uac = new SIPClientUserAgent(m_sipTransport, null, null, null, null);
m_uac.CallTrying += CallTrying;
m_uac.CallRinging += CallRinging;
m_uac.CallAnswered += CallAnswered;
m_uac.CallFailed += CallFailed;
// Get the SDP requesting that the public IP address be used if the host on the call destination is not a private IP address.
SDP sdp = _mediaManager.GetSDP(!(IPSocket.IsIPAddress(callURI.Host) && IPSocket.IsPrivateAddress(callURI.Host)));
System.Diagnostics.Debug.WriteLine(sdp.ToString());
SIPCallDescriptor callDescriptor = new SIPCallDescriptor(sipUsername, sipPassword, callURI.ToString(), fromHeader, null, null, null, null, SIPCallDirection.Out, _sdpMimeContentType, sdp.ToString(), null);
m_uac.Call(callDescriptor);
}
/// <summary>
/// Sends the SIP INVITE probe request.
/// </summary>
private void ProbeWorker(SIPAppServerWorker worker, bool isInitialProbe)
{
try
{
if (isInitialProbe)
{
worker.InitialProbeCount++;
}
int workerProcessID = worker.WorkerProcess.Id;
SIPEndPoint workerEndPoint = worker.AppServerEndpoint;
DateTime probeSentAt = DateTime.Now;
SIPCallDescriptor callDescriptor = new SIPCallDescriptor(m_dispatcherUsername, null, "sip:" + m_dispatcherUsername + "@" + workerEndPoint.GetIPEndPoint().ToString(),
"sip:" + m_dispatcherUsername + "@sipcalldispatcher", "sip:" + workerEndPoint.GetIPEndPoint().ToString(), null, null, null, SIPCallDirection.Out, null, null, null);
SIPClientUserAgent uac = new SIPClientUserAgent(m_sipTransport, null, null, null, null);
uac.CallFailed += (failedUAC, errorMessage) =>
{
AppServerCallFailed(failedUAC, errorMessage, workerProcessID, probeSentAt, isInitialProbe);
};
uac.CallAnswered += (call, sipResponse) =>
{
if (sipResponse.Status != SIPResponseStatusCodesEnum.BadExtension)
{
//logger.Warn("Probe call answered with unexpected response code of " + sipResponse.StatusCode + ".");
AppServerCallFailed(call, "Unexpected response of " + ((int)sipResponse.StatusCode) + " on probe call.", workerProcessID, probeSentAt, isInitialProbe);
}
else
{
AppServerCallSucceeded(call);
}
};
uac.Call(callDescriptor);
}
catch (Exception excp)
{
logger.Error("Exception SIPAppServerManager ProberWorker. " + excp.Message);
}
}
/// <summary>
/// Cleans up after a SIP call has completely finished.
/// </summary>
private void CallFinished()
{
if (_mediaManager != null)
{
_mediaManager.EndCall();
_mediaManager = null;
}
m_uac = null;
m_uas = null;
CallEnded();
}
//private SIPDNSLookupResult ResolveSIPEndPoint(SIPURI uri, bool async)
//{
// logger.Debug("Resolving SIP URI " + uri.ToParameterlessString() + ".");
// return null;
//}
/// <summary>
/// Places an outgoing SIP call.
/// </summary>
/// <param name="destination">The SIP URI to place a call to. The destination can be a full SIP URI in which case the all will
/// be placed anonymously directly to that URI. Alternatively it can be just the user portion of a URI in which case it will
/// be sent to the configured SIP server.</param>
public void Call(string destination, IPEndPoint rtpEndPoint, string sipUsername, string sipPassword, string realm)
{
// Determine if this is a direct anonymous call or whether it should be placed using the pre-configured SIP server account.
SIPURI callURI = null;
//string sipUsername = null;
//string sipPassword = null;
string fromHeader = null;
//if (destination.Contains("@") || m_sipServer == null)
//{
// Anonymous call direct to SIP server specified in the URI.
callURI = SIPURI.ParseSIPURIRelaxed(destination);
//}
//else
//{
// // This call will use the pre-configured SIP account.
// callURI = SIPURI.ParseSIPURIRelaxed(destination + "@" + m_sipServer);
// sipUsername = m_sipUsername;
// sipPassword = m_sipPassword;
fromHeader = (new SIPFromHeader(sipUsername, new SIPURI(sipUsername, realm, null), null)).ToString();
//}
StatusMessage("Starting call to " + callURI.ToString() + ".");
m_uac = new SIPClientUserAgent(m_sipTransport, null, null, null, null);
m_uac.CallTrying += CallTrying;
m_uac.CallRinging += CallRinging;
m_uac.CallAnswered += CallAnswered;
m_uac.CallFailed += CallFailed;
_audioChannel = new AudioChannel(rtpEndPoint);
// Get the SDP requesting that the public IP address be used if the host on the call destination is not a private IP address.
SDP sdp = _audioChannel.GetSDP();
SIPCallDescriptor callDescriptor = new SIPCallDescriptor(sipUsername, sipPassword, callURI.ToString(), fromHeader, null, null, null, null, SIPCallDirection.Out, SDP.SDP_MIME_CONTENTTYPE, sdp.ToString(), null);
m_uac.Call(callDescriptor);
}
private void ProbeWorkers() {
try {
while (!m_exit) {
try {
SIPEndPoint activeWorkerEndPoint = GetFirstHealthyEndPoint();
SIPCallDescriptor callDescriptor = new SIPCallDescriptor(m_dispatcherUsername, null, "sip:" + m_dispatcherUsername + "@" + activeWorkerEndPoint.SocketEndPoint.ToString(),
"sip:" + m_dispatcherUsername + "@sipcalldispatcher", "sip:" + activeWorkerEndPoint.SocketEndPoint.ToString(), null, null, null, SIPCallDirection.Out, null, null, null);
SIPClientUserAgent uac = new SIPClientUserAgent(m_sipTransport, null, null, null, null);
uac.CallAnswered += DispatcherCallAnswered;
uac.CallFailed += new SIPCallFailedDelegate(DispatcherCallFailed);
uac.Call(callDescriptor);
}
catch (Exception probeExcp) {
dispatcherLogger.Error("Exception SIPCallDispatcher Sending Probe. " + probeExcp.Message);
}
Thread.Sleep(PROBE_WORKER_CALL_PERIOD);
}
}
catch (Exception excp) {
logger.Error("Exception SIPCallDispatcher ProberWorkers. " + excp.Message);
}
}
private void StartNewCallSync(SIPCallDescriptor callDescriptor)
{
try
{
// A call will not be delayed if there are no other calls being attempted.
if (callDescriptor.DelaySeconds != 0 && m_switchCalls.Count > 0)
{
callDescriptor.DelayMRE = new ManualResetEvent(false);
lock (m_delayedCalls)
{
m_delayedCalls.Add(callDescriptor);
}
int delaySeconds = (callDescriptor.DelaySeconds > MAX_DELAY_SECONDS) ? MAX_DELAY_SECONDS : callDescriptor.DelaySeconds;
FireProxyLogEvent(new SIPMonitorConsoleEvent(SIPMonitorServerTypesEnum.AppServer, SIPMonitorEventTypesEnum.DialPlan, "Delaying call leg to " + callDescriptor.Uri + " by " + delaySeconds + "s.", m_username));
callDescriptor.DelayMRE.WaitOne(delaySeconds * 1000);
}
lock (m_delayedCalls)
{
m_delayedCalls.Remove(callDescriptor);
}
if (!m_callAnswered && !m_commandCancelled)
{
ISIPClientUserAgent uacCall = null;
if (callDescriptor.ToSIPAccount == null)
{
if (callDescriptor.IsGoogleVoiceCall)
{
FireProxyLogEvent(new SIPMonitorConsoleEvent(SIPMonitorServerTypesEnum.AppServer, SIPMonitorEventTypesEnum.DialPlan, "Creating Google Voice user agent for " + callDescriptor.Uri + ".", m_username));
uacCall = new GoogleVoiceUserAgent(m_sipTransport, m_callManager, m_statefulProxyLogEvent, m_username, m_adminMemberId, m_outboundProxySocket);
}
else
{
uacCall = new SIPClientUserAgent(m_sipTransport, m_outboundProxySocket, m_username, m_adminMemberId, m_statefulProxyLogEvent);
}
}
else
{
FireProxyLogEvent(new SIPMonitorConsoleEvent(SIPMonitorServerTypesEnum.AppServer, SIPMonitorEventTypesEnum.DialPlan, "Creating B2B call for " + callDescriptor.Uri + ".", m_username));
uacCall = new SIPB2BUserAgent(m_statefulProxyLogEvent, QueueNewCall_External, m_sipTransport, m_username, m_adminMemberId);
}
//ISIPClientUserAgent uacCall = new JingleUserAgent(m_username, m_adminMemberId, m_statefulProxyLogEvent);
lock (m_switchCalls)
{
m_switchCalls.Add(uacCall);
}
uacCall.CallAnswered += UACCallAnswered;
uacCall.CallFailed += UACCallFailed;
uacCall.CallRinging += UACCallProgress;
//uacCall.CallTrying += UACCallTrying;
uacCall.Call(callDescriptor);
}
}
catch (Exception excp)
{
logger.Error("Exception ForkCall StartNewCall. " + excp.Message);
}
}
private void StartNewCallSync(SIPCallDescriptor callDescriptor)
{
try
{
callDescriptor.DialPlanContextID = (m_dialPlanContext != null) ? m_dialPlanContext.DialPlanContextID : Guid.Empty;
if (callDescriptor.DelaySeconds != 0)
{
callDescriptor.DelayMRE = new ManualResetEvent(false);
lock (m_delayedCalls)
{
m_delayedCalls.Add(callDescriptor);
}
int delaySeconds = (callDescriptor.DelaySeconds > MAX_DELAY_SECONDS) ? MAX_DELAY_SECONDS : callDescriptor.DelaySeconds;
FireProxyLogEvent(new SIPMonitorConsoleEvent(SIPMonitorServerTypesEnum.AppServer, SIPMonitorEventTypesEnum.DialPlan, "Delaying call leg to " + callDescriptor.Uri + " by " + delaySeconds + "s.", m_username));
callDescriptor.DelayMRE.WaitOne(delaySeconds * 1000);
}
lock (m_delayedCalls)
{
m_delayedCalls.Remove(callDescriptor);
}
if (!m_callAnswered && !m_commandCancelled)
{
ISIPClientUserAgent uacCall = null;
if (callDescriptor.ToSIPAccount == null)
{
if (callDescriptor.IsGoogleVoiceCall)
{
FireProxyLogEvent(new SIPMonitorConsoleEvent(SIPMonitorServerTypesEnum.AppServer, SIPMonitorEventTypesEnum.DialPlan, "Creating Google Voice user agent for " + callDescriptor.Uri + ".", m_username));
uacCall = new GoogleVoiceUserAgent(m_sipTransport, m_callManager, m_statefulProxyLogEvent, m_username, m_adminMemberId, m_outboundProxySocket);
}
else
{
uacCall = new SIPClientUserAgent(m_sipTransport, m_outboundProxySocket, m_username, m_adminMemberId, m_statefulProxyLogEvent,
m_customerAccountDataLayer.GetRtccCustomer, m_customerAccountDataLayer.GetRtccRate, m_customerAccountDataLayer.GetBalance,
m_customerAccountDataLayer.ReserveInitialCredit, m_customerAccountDataLayer.UpdateRealTimeCallControlCDRID);
}
}
else
{
if (QueueNewCall_External == null)
{
FireProxyLogEvent(new SIPMonitorConsoleEvent(SIPMonitorServerTypesEnum.AppServer, SIPMonitorEventTypesEnum.DialPlan, "B2B calls are not supported in this dialplan manifestation.", m_username));
}
else
{
FireProxyLogEvent(new SIPMonitorConsoleEvent(SIPMonitorServerTypesEnum.AppServer, SIPMonitorEventTypesEnum.DialPlan, "Creating B2B call for " + callDescriptor.Uri + ".", m_username));
uacCall = new SIPB2BUserAgent(m_statefulProxyLogEvent, QueueNewCall_External, m_sipTransport, m_username, m_adminMemberId);
}
}
//ISIPClientUserAgent uacCall = new JingleUserAgent(m_username, m_adminMemberId, m_statefulProxyLogEvent);
if (uacCall != null)
{
lock (m_switchCalls)
{
m_switchCalls.Add(uacCall);
}
uacCall.CallAnswered += UACCallAnswered;
uacCall.CallFailed += UACCallFailed;
uacCall.CallRinging += UACCallProgress;
//uacCall.CallTrying += UACCallTrying;
uacCall.Call(callDescriptor);
}
}
}
catch (Exception excp)
{
logger.Error("Exception ForkCall StartNewCall. " + excp.Message);
}
}
private void FireCallAnswered(SIPClientUserAgent uac, SIPResponse answeredResponse)
{
if (CallAnswered != null)
{
CallAnswered(uac, answeredResponse);
}
}