/// <summary>
/// Initiates the call to the remote user agent server.
/// </summary>
/// <param name="sipCallDescriptor">The descriptor for the call that describes how to reach the user agent server and other properties.</param>
/// <param name="serverEndPoint">Optional. If the server end point for the call is known or has been resolved in advance. If
/// not set the SIP transport layer will attempt to resolve the destination at sending time.</param>
public SIPRequest Call(SIPCallDescriptor sipCallDescriptor, SIPEndPoint serverEndPoint)
{
try
{
m_sipCallDescriptor = sipCallDescriptor;
SIPURI callURI = SIPURI.ParseSIPURI(sipCallDescriptor.Uri);
SIPRouteSet routeSet = null;
logger.LogDebug($"UAC commencing call to {SIPURI.ParseSIPURI(m_sipCallDescriptor.Uri).CanonicalAddress}.");
// A custom route set may have been specified for the call.
if (m_sipCallDescriptor.RouteSet != null && m_sipCallDescriptor.RouteSet.IndexOf(OUTBOUNDPROXY_AS_ROUTESET_CHAR) != -1)
{
try
{
routeSet = new SIPRouteSet();
routeSet.PushRoute(new SIPRoute(m_sipCallDescriptor.RouteSet, true));
}
catch
{
logger.LogDebug("Error an outbound proxy value was not recognised in SIPClientUserAgent Call. " + m_sipCallDescriptor.RouteSet + ".");
}
}
string content = sipCallDescriptor.Content;
if (content.IsNullOrBlank())
{
logger.LogDebug("Body on UAC call was empty.");
}
if (this.m_sipCallDescriptor.BranchId.IsNullOrBlank())
{
this.m_sipCallDescriptor.BranchId = CallProperties.CreateBranchId();
}
if (this.m_sipCallDescriptor.CallId.IsNullOrBlank())
{
this.m_sipCallDescriptor.CallId = CallProperties.CreateNewCallId();
}
SIPRequest inviteRequest = GetInviteRequest(m_sipCallDescriptor, m_sipCallDescriptor.BranchId, m_sipCallDescriptor.CallId, routeSet, content, sipCallDescriptor.ContentType);
// Now that we have a destination socket create a new UAC transaction for forwarded leg of the call.
m_serverTransaction = new UACInviteTransaction(m_sipTransport, inviteRequest, m_outboundProxy);
m_serverTransaction.UACInviteTransactionInformationResponseReceived += ServerInformationResponseReceived;
m_serverTransaction.UACInviteTransactionFinalResponseReceived += ServerFinalResponseReceived;
m_serverTransaction.UACInviteTransactionFailed += ServerTransactionFailed;
m_serverTransaction.SendInviteRequest();
return(inviteRequest);
}
catch (ApplicationException appExcp)
{
m_serverTransaction?.CancelCall(appExcp.Message);
CallFailed?.Invoke(this, appExcp.Message, null);
return(null);
}
catch (Exception excp)
{
logger.LogError("Exception UserAgentClient Call. " + excp);
m_serverTransaction?.CancelCall("Unknown exception");
CallFailed?.Invoke(this, excp.Message, null);
return(null);
}
}
public void Call(SIPCallDescriptor sipCallDescriptor)
{
try
{
m_sipCallDescriptor = sipCallDescriptor;
SIPURI callURI = SIPURI.ParseSIPURI(sipCallDescriptor.Uri);
SIPRouteSet routeSet = null;
if (!m_callCancelled)
{
// If the outbound proxy is a loopback address, as it will normally be for local deployments, then it cannot be overriden.
if (m_outboundProxy != null && IPAddress.IsLoopback(m_outboundProxy.Address))
{
m_serverEndPoint = m_outboundProxy;
}
else if (!sipCallDescriptor.ProxySendFrom.IsNullOrBlank())
{
// If the binding has a specific proxy end point sent then the request needs to be forwarded to the proxy's default end point for it to take care of.
SIPEndPoint outboundProxyEndPoint = SIPEndPoint.ParseSIPEndPoint(sipCallDescriptor.ProxySendFrom);
m_outboundProxy = new SIPEndPoint(SIPProtocolsEnum.udp, new IPEndPoint(outboundProxyEndPoint.Address, m_defaultSIPPort));
m_serverEndPoint = m_outboundProxy;
Log_External(new SIPMonitorConsoleEvent(SIPMonitorServerTypesEnum.UserAgentClient, SIPMonitorEventTypesEnum.DialPlan, "SIPClientUserAgent Call using alternate outbound proxy of " + m_outboundProxy + ".", Owner));
}
else if (m_outboundProxy != null)
{
// Using the system outbound proxy only, no additional user routing requirements.
m_serverEndPoint = m_outboundProxy;
}
// A custom route set may have been specified for the call.
if (m_sipCallDescriptor.RouteSet != null && m_sipCallDescriptor.RouteSet.IndexOf(OUTBOUNDPROXY_AS_ROUTESET_CHAR) != -1)
{
try
{
routeSet = new SIPRouteSet();
routeSet.PushRoute(new SIPRoute(m_sipCallDescriptor.RouteSet, true));
}
catch
{
Log_External(new SIPMonitorConsoleEvent(SIPMonitorServerTypesEnum.UserAgentClient, SIPMonitorEventTypesEnum.DialPlan, "Error an outbound proxy value was not recognised in SIPClientUserAgent Call. " + m_sipCallDescriptor.RouteSet + ".", Owner));
}
}
// No outbound proxy, determine the forward destination based on the SIP request.
if (m_serverEndPoint == null)
{
SIPDNSLookupResult lookupResult = null;
if (routeSet == null || routeSet.Length == 0)
{
Log_External(new SIPMonitorConsoleEvent(SIPMonitorServerTypesEnum.UserAgentClient, SIPMonitorEventTypesEnum.DialPlan, "Attempting to resolve " + callURI.Host + ".", Owner));
lookupResult = m_sipTransport.GetURIEndPoint(callURI, false);
}
else
{
Log_External(new SIPMonitorConsoleEvent(SIPMonitorServerTypesEnum.UserAgentClient, SIPMonitorEventTypesEnum.DialPlan, "Route set for call " + routeSet.ToString() + ".", Owner));
lookupResult = m_sipTransport.GetURIEndPoint(routeSet.TopRoute.URI, false);
}
if (lookupResult.LookupError != null)
{
Log_External(new SIPMonitorConsoleEvent(SIPMonitorServerTypesEnum.UserAgentClient, SIPMonitorEventTypesEnum.DialPlan, "DNS error resolving " + callURI.Host + ", " + lookupResult.LookupError + ". Call cannot proceed.", Owner));
}
else
{
m_serverEndPoint = lookupResult.GetSIPEndPoint();
}
}
if (m_callCancelled)
{
Log_External(new SIPMonitorConsoleEvent(SIPMonitorServerTypesEnum.UserAgentClient, SIPMonitorEventTypesEnum.DialPlan, "Call was cancelled during DNS resolution of " + callURI.Host, Owner));
FireCallFailed(this, "Cancelled by caller");
}
else if (m_serverEndPoint != null)
{
Log_External(new SIPMonitorConsoleEvent(SIPMonitorServerTypesEnum.UserAgentClient, SIPMonitorEventTypesEnum.DialPlan, "Switching to " + SIPURI.ParseSIPURI(m_sipCallDescriptor.Uri).CanonicalAddress + " via " + m_serverEndPoint + ".", Owner));
m_localSIPEndPoint = m_sipTransport.GetDefaultSIPEndPoint(m_serverEndPoint);
if (m_localSIPEndPoint == null)
{
throw new ApplicationException("The call could not locate an appropriate SIP transport channel for protocol " + callURI.Protocol + ".");
}
string content = sipCallDescriptor.Content;
if (content.IsNullOrBlank())
{
Log_External(new SIPMonitorConsoleEvent(SIPMonitorServerTypesEnum.AppServer, SIPMonitorEventTypesEnum.DialPlan, "Body on UAC call was empty.", Owner));
}
else if (m_sipCallDescriptor.ContentType == m_sdpContentType)
{
if (!m_sipCallDescriptor.MangleResponseSDP)
{
IPEndPoint sdpEndPoint = SDP.GetSDPRTPEndPoint(content);
if (sdpEndPoint != null)
{
Log_External(new SIPMonitorConsoleEvent(SIPMonitorServerTypesEnum.AppServer, SIPMonitorEventTypesEnum.DialPlan, "SDP on UAC call was set to NOT mangle, RTP socket " + sdpEndPoint.ToString() + ".", Owner));
}
else
{
Log_External(new SIPMonitorConsoleEvent(SIPMonitorServerTypesEnum.AppServer, SIPMonitorEventTypesEnum.DialPlan, "SDP on UAC call was set to NOT mangle, RTP socket could not be determined.", Owner));
}
}
else
{
IPEndPoint sdpEndPoint = SDP.GetSDPRTPEndPoint(content);
if (sdpEndPoint != null)
{
if (!IPSocket.IsPrivateAddress(sdpEndPoint.Address.ToString()))
{
Log_External(new SIPMonitorConsoleEvent(SIPMonitorServerTypesEnum.AppServer, SIPMonitorEventTypesEnum.DialPlan, "SDP on UAC call had public IP not mangled, RTP socket " + sdpEndPoint.ToString() + ".", Owner));
}
else
{
bool wasSDPMangled = false;
if (sipCallDescriptor.MangleIPAddress != null)
{
if (sdpEndPoint != null)
{
content = SIPPacketMangler.MangleSDP(content, sipCallDescriptor.MangleIPAddress.ToString(), out wasSDPMangled);
}
}
if (wasSDPMangled)
{
Log_External(new SIPMonitorConsoleEvent(SIPMonitorServerTypesEnum.AppServer, SIPMonitorEventTypesEnum.DialPlan, "SDP on UAC call had RTP socket mangled from " + sdpEndPoint.ToString() + " to " + sipCallDescriptor.MangleIPAddress.ToString() + ":" + sdpEndPoint.Port + ".", Owner));
}
else if (sdpEndPoint != null)
{
Log_External(new SIPMonitorConsoleEvent(SIPMonitorServerTypesEnum.AppServer, SIPMonitorEventTypesEnum.DialPlan, "SDP on UAC could not be mangled, using original RTP socket of " + sdpEndPoint.ToString() + ".", Owner));
}
}
}
else
{
Log_External(new SIPMonitorConsoleEvent(SIPMonitorServerTypesEnum.AppServer, SIPMonitorEventTypesEnum.DialPlan, "SDP RTP socket on UAC call could not be determined.", Owner));
}
}
}
SIPRequest switchServerInvite = GetInviteRequest(m_sipCallDescriptor, CallProperties.CreateBranchId(), CallProperties.CreateNewCallId(), m_localSIPEndPoint, routeSet, content, sipCallDescriptor.ContentType);
// Now that we have a destination socket create a new UAC transaction for forwarded leg of the call.
m_serverTransaction = m_sipTransport.CreateUACTransaction(switchServerInvite, m_serverEndPoint, m_localSIPEndPoint, m_outboundProxy);
m_serverTransaction.CDR.DialPlanContextID = m_sipCallDescriptor.DialPlanContextID;
#region Real-time call control processing.
string rtccError = null;
if (m_serverTransaction.CDR != null)
{
m_serverTransaction.CDR.Owner = Owner;
m_serverTransaction.CDR.AdminMemberId = AdminMemberId;
m_serverTransaction.CDR.Updated();
#if !SILVERLIGHT
if (m_sipCallDescriptor.AccountCode != null && RtccGetCustomer_External != null)
{
//var customerAccount = m_customerAccountDataLayer.CheckAccountCode(Owner, m_sipCallDescriptor.AccountCode);
var customerAccount = RtccGetCustomer_External(Owner, m_sipCallDescriptor.AccountCode);
if (customerAccount == null)
{
Log_External(new SIPMonitorConsoleEvent(SIPMonitorServerTypesEnum.AppServer, SIPMonitorEventTypesEnum.DialPlan, "A billable call could not proceed as no account exists for account code or number " + m_sipCallDescriptor.AccountCode + ".", Owner));
rtccLogger.Debug("A billable call could not proceed as no account exists for account code or number " + m_sipCallDescriptor.AccountCode + " and owner " + Owner + ".");
rtccError = "Real-time call control invalid account code";
}
else
{
AccountCode = customerAccount.AccountCode;
string rateDestination = m_sipCallDescriptor.Uri;
if (SIPURI.TryParse(m_sipCallDescriptor.Uri))
{
rateDestination = SIPURI.ParseSIPURIRelaxed(m_sipCallDescriptor.Uri).User;
}
//var rate = m_customerAccountDataLayer.GetRate(Owner, m_sipCallDescriptor.RateCode, rateDestination, customerAccount.RatePlan);
var rate = RtccGetRate_External(Owner, m_sipCallDescriptor.RateCode, rateDestination, customerAccount.RatePlan);
if (rate == null)
{
Log_External(new SIPMonitorConsoleEvent(SIPMonitorServerTypesEnum.AppServer, SIPMonitorEventTypesEnum.DialPlan, "A billable call could not proceed as no rate could be determined for destination " + rateDestination + ".", Owner));
rtccLogger.Debug("A billable call could not proceed as no rate could be determined for destination " + rateDestination + " and owner " + Owner + ".");
rtccError = "Real-time call control no rate";
}
else
{
Rate = rate.RatePerIncrement;
if (rate.RatePerIncrement == 0 && rate.SetupCost == 0)
{
Log_External(new SIPMonitorConsoleEvent(SIPMonitorServerTypesEnum.AppServer, SIPMonitorEventTypesEnum.DialPlan, "The rate and setup cost for the " + rateDestination + "were both zero. The call will be allowed to proceed with no RTCC reservation.", Owner));
}
else
{
//decimal balance = m_customerAccountDataLayer.GetBalance(AccountCode);
decimal balance = RtccGetBalance_External(AccountCode);
if (balance < Rate)
{
Log_External(new SIPMonitorConsoleEvent(SIPMonitorServerTypesEnum.AppServer, SIPMonitorEventTypesEnum.DialPlan, "A billable call could not proceed as the available credit for " + AccountCode + " was not sufficient for 60 seconds to destination " + rateDestination + ".", Owner));
rtccLogger.Debug("A billable call could not proceed as the available credit for " + AccountCode + " was not sufficient for 60 seconds to destination " + rateDestination + " and owner " + Owner + ".");
rtccError = "Real-time call control insufficient credit";
}
else
{
int intialSeconds = 0;
//var reservationCost = m_customerAccountDataLayer.ReserveInitialCredit(AccountCode, rate, m_serverTransaction.CDR, out intialSeconds);
var reservationCost = RtccReserveInitialCredit_External(AccountCode, rate.ID, m_serverTransaction.CDR, out intialSeconds);
if (reservationCost == Decimal.MinusOne)
{
Log_External(new SIPMonitorConsoleEvent(SIPMonitorServerTypesEnum.AppServer, SIPMonitorEventTypesEnum.DialPlan, "Call will not proceed as the intial real-time call control credit reservation failed.", Owner));
rtccLogger.Debug("Call will not proceed as the intial real-time call control credit reservation failed for owner " + Owner + ".");
rtccError = "Real-time call control initial reservation failed";
}
else
{
ReservedCredit = reservationCost;
ReservedSeconds = intialSeconds;
}
}
}
}
}
}
#endif
}
#endregion
if (rtccError == null)
{
m_serverTransaction.UACInviteTransactionInformationResponseReceived += ServerInformationResponseReceived;
m_serverTransaction.UACInviteTransactionFinalResponseReceived += ServerFinalResponseReceived;
m_serverTransaction.UACInviteTransactionTimedOut += ServerTimedOut;
m_serverTransaction.TransactionTraceMessage += TransactionTraceMessage;
m_serverTransaction.SendInviteRequest(m_serverEndPoint, m_serverTransaction.TransactionRequest);
}
else
{
m_serverTransaction.CancelCall(rtccError);
FireCallFailed(this, rtccError);
}
}
else
{
if (routeSet == null || routeSet.Length == 0)
{
Log_External(new SIPMonitorConsoleEvent(SIPMonitorServerTypesEnum.UserAgentClient, SIPMonitorEventTypesEnum.DialPlan, "Forward leg failed, could not resolve URI host " + callURI.Host, Owner));
m_serverTransaction?.CancelCall("Unresolvable destination " + callURI.Host);
FireCallFailed(this, "unresolvable destination " + callURI.Host);
}
else
{
Log_External(new SIPMonitorConsoleEvent(SIPMonitorServerTypesEnum.UserAgentClient, SIPMonitorEventTypesEnum.DialPlan, "Forward leg failed, could not resolve top Route host " + routeSet.TopRoute.Host, Owner));
m_serverTransaction?.CancelCall("Unresolvable destination " + routeSet.TopRoute.Host);
FireCallFailed(this, "unresolvable destination " + routeSet.TopRoute.Host);
}
}
}
}
catch (ApplicationException appExcp)
{
m_serverTransaction?.CancelCall(appExcp.Message);
FireCallFailed(this, appExcp.Message);
}
catch (Exception excp)
{
Log_External(new SIPMonitorConsoleEvent(SIPMonitorServerTypesEnum.UserAgentClient, SIPMonitorEventTypesEnum.DialPlan, "Exception UserAgentClient Call. " + excp.Message, Owner));
m_serverTransaction?.CancelCall("Unknown exception");
FireCallFailed(this, excp.Message);
}
}
/// <summary>
/// Gets the destination of the remote SIP end point for this call.
/// </summary>
/// <param name="sipCallDescriptor">The call descriptor containing the settings to use to place the call.</param>
/// <returns>The server end point for the call.</returns>
public async Task <SIPEndPoint> GetCallDestination(SIPCallDescriptor sipCallDescriptor)
{
SIPURI callURI = SIPURI.ParseSIPURI(sipCallDescriptor.Uri);
SIPEndPoint serverEndPoint = null;
// If the outbound proxy is a loopback address, as it will normally be for local deployments, then it cannot be overriden.
if (m_outboundProxy != null && IPAddress.IsLoopback(m_outboundProxy.Address))
{
serverEndPoint = m_outboundProxy;
}
else if (!sipCallDescriptor.ProxySendFrom.IsNullOrBlank())
{
// If the binding has a specific proxy end point sent then the request needs to be forwarded to the proxy's default end point for it to take care of.
//SIPEndPoint outboundProxyEndPoint = SIPEndPoint.ParseSIPEndPoint(sipCallDescriptor.ProxySendFrom);
//m_outboundProxy = new SIPEndPoint(SIPProtocolsEnum.udp, outboundProxyEndPoint.Address, SIPConstants.DEFAULT_SIP_PORT);
//m_serverEndPoint = m_outboundProxy;
m_outboundProxy = SIPEndPoint.ParseSIPEndPoint(sipCallDescriptor.ProxySendFrom);
serverEndPoint = m_outboundProxy;
logger.LogDebug($"SIPClientUserAgent Call using alternate outbound proxy of {serverEndPoint}.");
}
else if (m_outboundProxy != null)
{
// Using the system outbound proxy only, no additional user routing requirements.
serverEndPoint = m_outboundProxy;
}
// No outbound proxy, determine the forward destination based on the SIP request.
if (serverEndPoint == null)
{
//SIPDNSLookupResult lookupResult = null;
SIPEndPoint lookupResult = null;
double lookupDurationMilliseconds = 0;
if (sipCallDescriptor.RouteSet != null && sipCallDescriptor.RouteSet.IndexOf(OUTBOUNDPROXY_AS_ROUTESET_CHAR) != -1)
{
var routeSet = new SIPRouteSet();
routeSet.PushRoute(new SIPRoute(sipCallDescriptor.RouteSet, true));
logger.LogDebug("Route set for call " + routeSet.ToString() + ".");
//lookupResult = m_sipTransport.GetURIEndPoint(routeSet.TopRoute.URI, false);
lookupResult = await m_sipTransport.ResolveSIPUriAsync(routeSet.TopRoute.URI).ConfigureAwait(false);
}
else
{
logger.LogDebug("SIPClientUserAgent attempting to resolve " + callURI.Host + ".");
//lookupResult = m_sipTransport.GetURIEndPoint(callURI, false);
DateTime lookupStartedAt = DateTime.Now;
lookupResult = await m_sipTransport.ResolveSIPUriAsync(callURI).ConfigureAwait(false);
lookupDurationMilliseconds = DateTime.Now.Subtract(lookupStartedAt).TotalMilliseconds;
}
if (lookupResult == null)
{
logger.LogDebug($"SIPClientUserAgent DNS failure resolving {callURI.Host} in {lookupDurationMilliseconds:0.##}ms. Call cannot proceed.");
}
else
{
logger.LogDebug($"SIPClientUserAgent resolved {callURI.Host} to {lookupResult} in {lookupDurationMilliseconds:0.##}ms.");
serverEndPoint = lookupResult;
}
}
return(serverEndPoint);
}
public void ReferOutOfDialog(SIPURI fromUri, SIPURI toUri, SIPURI referToUri, ReplacesCallDescriptor sipReplacesCallDescriptor)
{
try
{
m_sipCallDescriptor = new SIPCallDescriptor(null,toUri.ToString(),fromUri.ToString(),null,null);
m_sipCallDescriptor.Gruu = toUri.Parameters.Get(SIPCallDescriptor.GRUU_KEY);
m_sipCallDescriptor.ReplacesCall = sipReplacesCallDescriptor;
SIPURI callURI = SIPURI.ParseSIPURI(m_sipCallDescriptor.Uri);
// If the outbound proxy is a loopback address, as it will normally be for local deployments, then it cannot be overriden.
if (m_outboundProxy != null && IPAddress.IsLoopback(m_outboundProxy.Address))
{
m_serverEndPoint = m_outboundProxy;
}
else if (!m_sipCallDescriptor.ProxySendFrom.IsNullOrBlank())
{
// If the binding has a specific proxy end point sent then the request needs to be forwarded to the proxy's default end point for it to take care of.
SIPEndPoint outboundProxyEndPoint = SIPEndPoint.ParseSIPEndPoint(m_sipCallDescriptor.ProxySendFrom);
m_outboundProxy = new SIPEndPoint(SIPProtocolsEnum.udp, new IPEndPoint(outboundProxyEndPoint.Address, m_defaultSIPPort));
m_serverEndPoint = m_outboundProxy;
Log_External(new SIPMonitorConsoleEvent(SIPMonitorServerTypesEnum.ReferUserAgentClient, SIPMonitorEventTypesEnum.Refer, "SIPReferClientUserAgent refer request using alternate outbound proxy of " + m_outboundProxy + ".", Owner));
}
else if (m_outboundProxy != null)
{
// Using the system outbound proxy only, no additional user routing requirements.
m_serverEndPoint = m_outboundProxy;
}
// A custom route set may have been specified for the call.
if (m_sipCallDescriptor.RouteSet != null && m_sipCallDescriptor.RouteSet.IndexOf(OUTBOUNDPROXY_AS_ROUTESET_CHAR) != -1)
{
try
{
RouteSet = new SIPRouteSet();
RouteSet.PushRoute(new SIPRoute(m_sipCallDescriptor.RouteSet, true));
}
catch
{
Log_External(new SIPMonitorConsoleEvent(SIPMonitorServerTypesEnum.ReferUserAgentClient, SIPMonitorEventTypesEnum.Refer, "Error an outbound proxy value was not recognised in SIPReferClientUserAgent refer request. " + m_sipCallDescriptor.RouteSet + ".", Owner));
}
}
// No outbound proxy, determine the forward destination based on the SIP request.
if (m_serverEndPoint == null)
{
SIPDNSLookupResult lookupResult = null;
if (RouteSet == null || RouteSet.Length == 0)
{
Log_External(new SIPMonitorConsoleEvent(SIPMonitorServerTypesEnum.ReferUserAgentClient, SIPMonitorEventTypesEnum.Refer, "Attempting to resolve " + callURI.Host + ".", Owner));
lookupResult = m_sipTransport.GetURIEndPoint(callURI, false);
}
else
{
Log_External(new SIPMonitorConsoleEvent(SIPMonitorServerTypesEnum.ReferUserAgentClient, SIPMonitorEventTypesEnum.Refer, "Route set for refer request " + RouteSet.ToString() + ".", Owner));
lookupResult = m_sipTransport.GetURIEndPoint(RouteSet.TopRoute.URI, false);
}
if (lookupResult.LookupError != null)
{
Log_External(new SIPMonitorConsoleEvent(SIPMonitorServerTypesEnum.ReferUserAgentClient, SIPMonitorEventTypesEnum.Refer, "DNS error resolving " + callURI.Host + ", " + lookupResult.LookupError + ". Refer request cannot proceed.", Owner));
}
else
{
m_serverEndPoint = lookupResult.GetSIPEndPoint();
}
}
if (m_serverEndPoint != null)
{
Log_External(new SIPMonitorConsoleEvent(SIPMonitorServerTypesEnum.ReferUserAgentClient, SIPMonitorEventTypesEnum.Refer, "Switching to " + SIPURI.ParseSIPURI(m_sipCallDescriptor.Uri).CanonicalAddress + " via " + m_serverEndPoint + ".", Owner));
m_localSIPEndPoint = m_sipTransport.GetDefaultSIPEndPoint(m_serverEndPoint);
if (m_localSIPEndPoint == null)
{
throw new ApplicationException("The refer request could not locate an appropriate SIP transport channel for protocol " + callURI.Protocol + ".");
}
SIPRequest referRequest = GetReferRequest(m_localSIPEndPoint,referToUri, sipReplacesCallDescriptor);
// Now that we have a destination socket create a new UAC transaction for forwarded leg of the call.
m_serverTransaction = m_sipTransport.CreateNonInviteTransaction(referRequest, m_serverEndPoint, m_localSIPEndPoint, m_outboundProxy);
m_serverTransaction.NonInviteTransactionFinalResponseReceived += m_serverTransaction_NonInviteTransactionFinalResponseReceived;
m_serverTransaction.NonInviteTransactionTimedOut += m_serverTransaction_NonInviteTransactionTimedOut;
m_serverTransaction.TransactionTraceMessage += TransactionTraceMessage;
m_serverTransaction.SendReliableRequest();
}
else
{
if (RouteSet == null || RouteSet.Length == 0)
{
Log_External(new SIPMonitorConsoleEvent(SIPMonitorServerTypesEnum.ReferUserAgentClient, SIPMonitorEventTypesEnum.Refer, "Forward leg failed, could not resolve URI host " + callURI.Host, Owner));
FireReferFailed(this, "unresolvable destination " + callURI.Host);
}
else
{
Log_External(new SIPMonitorConsoleEvent(SIPMonitorServerTypesEnum.ReferUserAgentClient, SIPMonitorEventTypesEnum.Refer, "Forward leg failed, could not resolve top Route host " + RouteSet.TopRoute.Host, Owner));
FireReferFailed(this, "unresolvable destination " + RouteSet.TopRoute.Host);
}
}
}
catch (ApplicationException appExcp)
{
FireReferFailed(this, appExcp.Message);
}
catch (Exception excp)
{
Log_External(new SIPMonitorConsoleEvent(SIPMonitorServerTypesEnum.ReferUserAgentClient, SIPMonitorEventTypesEnum.Refer, "Exception UserAgentClient Call. " + excp.Message, Owner));
FireReferFailed(this, excp.Message);
}
}
