private void SIPCancelTransaction_TransactionFinalResponseReceived(SIPEndPoint localSIPEndPoint, SIPEndPoint remoteEndPoint, SIPTransaction sipTransaction, SIPResponse sipResponse)
{
if (sipResponse.StatusCode < 200)
{
logger.Warn("A SIP CANCEL transaction received an unexpected SIP information response " + sipResponse.ReasonPhrase + ".");
}
else
{
if (CancelTransactionFinalResponseReceived != null)
{
CancelTransactionFinalResponseReceived(localSIPEndPoint, remoteEndPoint, sipTransaction, sipResponse);
}
}
}
public static bool IsMagicJackRequest(SIPResponse sipResponse) {
if (sipResponse.Header.AuthenticationHeader != null &&
sipResponse.Header.AuthenticationHeader.SIPDigest.Realm == "stratus.com" &&
sipResponse.Header.To != null &&
sipResponse.Header.To.ToURI != null &&
sipResponse.Header.To.ToURI.Host.ToLower() == "talk4free.com") {
return true;
}
return false;
}
/// <summary>
/// MagicJack apply a custom algorithm when calculating their nonce seemingly in order to
/// prevent other SIP UAs from being able to authenticate. This method attempts to apply the same
/// algorithm to allow the authenticated requests from this stack.
/// </summary>
/// <remarks>
/// MJ is modifying the nonce dynamically. They append an underscore, then 8 characters to the nonce before computing the MD5. The 8 characters come from the call id.
/// Use the first 8 bytes of the nonce as an index into your call id.
/// Assume your callid is:
/// callid: 9876ABC56738DD43...
/// index: 0123456789ABCDEF
/// and your nonce is: 8765abc4_32190
/// Take the first digit of your nonce (which in our example is 8 ), and find the value in the callid at index 8, which is 6.
/// So, append that to the nonce. 8765abc4_32190_6
/// Then move on to the second digit of the nonce, which is 7 in our example. Find the value at index 7 in the callid, which is 5, and append that:
/// 8765abc4_32190_65 continue until you have done 8 digits. Your new nonce would be:
/// 8765abc4_32190_65CB38DA Use this value when computing the MD5, but pass the original nonce to magicJack.
/// </remarks>
/// <param name="authReqdResponse"></param>
/// <returns></returns>
public static SIPAuthenticationHeader GetAuthenticationHeader(SIPResponse authReqdResponse) {
try {
SIPAuthenticationHeader mjAuthHeader = new SIPAuthenticationHeader(authReqdResponse.Header.AuthenticationHeader.SIPDigest);
string origNonce = mjAuthHeader.SIPDigest.Nonce;
string mjNonce = GetNonce(origNonce, authReqdResponse.Header.CallId);
mjAuthHeader.SIPDigest.Nonce = mjNonce;
mjAuthHeader.SIPDigest.Response = mjAuthHeader.SIPDigest.Digest;
mjAuthHeader.SIPDigest.Nonce = origNonce;
return mjAuthHeader;
}
catch (Exception excp) {
logger.Error("Exception SIPProviderMagicJack GetAuthenticationHeader. " + excp.Message);
throw;
}
}
/// <summary>
/// In transaction ACK requests are for non-2xx responses, i.e. INVITE rejected and no dialogue being created.
/// </summary>
private SIPRequest GetInTransactionACKRequest(SIPResponse sipResponse, SIPURI ackURI, SIPEndPoint localSIPEndPoint)
{
SIPRequest ackRequest = new SIPRequest(SIPMethodsEnum.ACK, ackURI.ToString());
ackRequest.LocalSIPEndPoint = localSIPEndPoint;
SIPHeader header = new SIPHeader(TransactionRequest.Header.From, sipResponse.Header.To, sipResponse.Header.CSeq, sipResponse.Header.CallId);
header.CSeqMethod = SIPMethodsEnum.ACK;
header.AuthenticationHeader = TransactionRequest.Header.AuthenticationHeader;
header.Routes = base.TransactionRequest.Header.Routes;
header.ProxySendFrom = base.TransactionRequest.Header.ProxySendFrom;
ackRequest.Header = header;
SIPViaHeader viaHeader = new SIPViaHeader(localSIPEndPoint, sipResponse.Header.Vias.TopViaHeader.Branch);
ackRequest.Header.Vias.PushViaHeader(viaHeader);
return ackRequest;
}
private void UACInviteTransaction_TransactionFinalResponseReceived(SIPEndPoint localSIPEndPoint, SIPEndPoint remoteEndPoint, SIPTransaction sipTransaction, SIPResponse sipResponse)
{
try
{
// BranchId for 2xx responses needs to be a new one, non-2xx final responses use same one as original request.
SIPRequest ackRequest = null;
if (sipResponse.StatusCode >= 200 && sipResponse.StatusCode < 299)
{
if (sipResponse.Header.To != null)
{
m_remoteTag = sipResponse.Header.To.ToTag;
}
SIPURI ackURI = m_transactionRequest.URI;
if (sipResponse.Header.Contact != null && sipResponse.Header.Contact.Count > 0)
{
ackURI = sipResponse.Header.Contact[0].ContactURI;
// Don't mangle private contacts if there is a Record-Route header. If a proxy is putting private IP's in a Record-Route header that's its problem.
if ((sipResponse.Header.RecordRoutes == null || sipResponse.Header.RecordRoutes.Length == 0)
&& IPSocket.IsPrivateAddress(ackURI.Host) && !sipResponse.Header.ProxyReceivedFrom.IsNullOrBlank())
{
// Setting the Proxy-ReceivedOn header is how an upstream proxy will let an agent know it should mangle the contact.
SIPEndPoint remoteUASSIPEndPoint = SIPEndPoint.ParseSIPEndPoint(sipResponse.Header.ProxyReceivedFrom);
ackURI.Host = remoteUASSIPEndPoint.GetIPEndPoint().ToString();
}
}
// ACK for 2xx response needs to be a new transaction and gets routed based on SIP request fields.
ackRequest = GetNewTransactionACKRequest(sipResponse, ackURI, LocalSIPEndPoint);
base.SendRequest(ackRequest);
}
else
{
// ACK for non 2xx response is part of the INVITE transaction and gets routed to the same endpoint as the INVITE.
ackRequest = GetInTransactionACKRequest(sipResponse, m_transactionRequest.URI, LocalSIPEndPoint);
base.SendRequest(RemoteEndPoint, ackRequest);
}
if (UACInviteTransactionFinalResponseReceived != null)
{
UACInviteTransactionFinalResponseReceived(localSIPEndPoint, remoteEndPoint, sipTransaction, sipResponse);
}
if (CDR != null)
{
SIPEndPoint localEP = SIPEndPoint.TryParse(sipResponse.Header.ProxyReceivedOn) ?? localSIPEndPoint;
SIPEndPoint remoteEP = SIPEndPoint.TryParse(sipResponse.Header.ProxyReceivedFrom) ?? remoteEndPoint;
CDR.Answered(sipResponse.StatusCode, sipResponse.Status, sipResponse.ReasonPhrase, localEP, remoteEP);
}
}
catch (Exception excp)
{
logger.Error("Exception UACInviteTransaction_TransactionFinalResponseReceived. " + excp.Message);
}
}
/// <summary>
/// The event handler for responses to the initial register request.
/// </summary>
private void ServerResponseReceived(SIPEndPoint localSIPEndPoint, SIPEndPoint remoteEndPoint, SIPTransaction sipTransaction, SIPResponse sipResponse)
{
try
{
Log_External(new SIPMonitorConsoleEvent(SIPMonitorServerTypesEnum.UserAgentClient, SIPMonitorEventTypesEnum.ContactRegisterInProgress, "Server response " + sipResponse.Status + " received for " + m_sipAccountAOR.ToString() + ".", m_owner));
if (sipResponse.Status == SIPResponseStatusCodesEnum.ProxyAuthenticationRequired || sipResponse.Status == SIPResponseStatusCodesEnum.Unauthorised)
{
if (sipResponse.Header.AuthenticationHeader != null)
{
if (m_attempts >= MAX_REGISTER_ATTEMPTS)
{
Log_External(new SIPMonitorConsoleEvent(SIPMonitorServerTypesEnum.UserAgentClient, SIPMonitorEventTypesEnum.ContactRegisterFailed, "Registration to " + m_sipAccountAOR.ToString() + " reached the maximum number of allowed attempts without a failure condition.", m_owner));
m_isRegistered = false;
if (RegistrationTemporaryFailure != null)
{
RegistrationTemporaryFailure(m_sipAccountAOR, "Registration reached the maximum number of allowed attempts.");
}
m_waitForRegistrationMRE.Set();
}
else
{
m_attempts++;
SIPRequest authenticatedRequest = GetAuthenticatedRegistrationRequest(sipTransaction.TransactionRequest, sipResponse);
SIPNonInviteTransaction regAuthTransaction = m_sipTransport.CreateNonInviteTransaction(authenticatedRequest, sipTransaction.RemoteEndPoint, localSIPEndPoint, m_outboundProxy);
regAuthTransaction.NonInviteTransactionFinalResponseReceived += (lep, rep, tn, rsp) => { ThreadPool.QueueUserWorkItem(delegate { AuthResponseReceived(lep, rep, tn, rsp); }); };
regAuthTransaction.NonInviteTransactionTimedOut += (tn) => { ThreadPool.QueueUserWorkItem(delegate { RegistrationTimedOut(tn); }); };
m_sipTransport.SendSIPReliable(regAuthTransaction);
}
}
else
{
Log_External(new SIPMonitorConsoleEvent(SIPMonitorServerTypesEnum.UserAgentClient, SIPMonitorEventTypesEnum.ContactRegisterFailed, "Registration failed with " + sipResponse.Status + " but no authentication header was supplied for " + m_sipAccountAOR.ToString() + ".", m_owner));
m_isRegistered = false;
if (RegistrationTemporaryFailure != null)
{
RegistrationTemporaryFailure(m_sipAccountAOR, "Registration failed with " + sipResponse.Status + " but no authentication header was supplied.");
}
m_waitForRegistrationMRE.Set();
}
}
else
{
if (sipResponse.Status == SIPResponseStatusCodesEnum.Ok)
{
if (m_expiry > 0)
{
m_isRegistered = true;
m_expiry = GetUpdatedExpiry(sipResponse);
//if (sipResponse.Header.SwitchboardToken != null && m_lastServerNonce != null)
//{
// SwitchboardToken = Crypto.SymmetricDecrypt(m_password, m_lastServerNonce, sipResponse.Header.SwitchboardToken);
//}
RegistrationSuccessful(m_sipAccountAOR);
}
else
{
m_isRegistered = false;
RegistrationRemoved(m_sipAccountAOR);
}
m_waitForRegistrationMRE.Set();
}
else if (sipResponse.Status == SIPResponseStatusCodesEnum.Forbidden || sipResponse.Status == SIPResponseStatusCodesEnum.NotFound)
{
// SIP account does not appear to exist.
Log_External(new SIPMonitorConsoleEvent(SIPMonitorServerTypesEnum.UserAgentClient, SIPMonitorEventTypesEnum.ContactRegisterFailed, "Registration failed with " + sipResponse.Status + " for " + m_sipAccountAOR.ToString() + ", no further registration attempts will be made.", m_owner));
string reasonPhrase = (sipResponse.ReasonPhrase.IsNullOrBlank()) ? sipResponse.Status.ToString() : sipResponse.ReasonPhrase;
if (RegistrationFailed != null)
{
RegistrationFailed(m_sipAccountAOR, "Registration failed with " + (int)sipResponse.Status + " " + reasonPhrase + ".");
}
m_exit = true;
m_waitForRegistrationMRE.Set();
}
else if (sipResponse.Status == SIPResponseStatusCodesEnum.IntervalTooBrief && m_expiry != 0)
{
m_expiry = GetUpdatedExpiryForIntervalTooBrief(sipResponse);
Log_External(new SIPMonitorConsoleEvent(SIPMonitorServerTypesEnum.UserAgentClient, SIPMonitorEventTypesEnum.ContactRegisterInProgress, "Registration for " + m_sipAccountAOR.ToString() + " had a too short expiry, updated to +" + m_expiry + " and trying again.", m_owner));
SendInitialRegister();
}
else
{
Log_External(new SIPMonitorConsoleEvent(SIPMonitorServerTypesEnum.UserAgentClient, SIPMonitorEventTypesEnum.ContactRegisterFailed, "Registration failed with " + sipResponse.Status + " for " + m_sipAccountAOR.ToString() + ".", m_owner));
m_isRegistered = false;
if (RegistrationTemporaryFailure != null)
{
RegistrationTemporaryFailure(m_sipAccountAOR, "Registration failed with " + sipResponse.Status + ".");
}
m_waitForRegistrationMRE.Set();
}
}
}
catch (Exception excp)
{
logger.Error("Exception SIPRegistrationUserAgent ServerResponseReceived (" + remoteEndPoint + "). " + excp.Message);
}
}
/// <summary>
/// From RFC3261: Stateless Proxy Response Processing:
///
/// When a response arrives at a stateless proxy, the proxy MUST inspect the sent-by value in the first
/// (topmost) Via header field value. If that address matches the proxy, (it equals a value this proxy has
/// inserted into previous requests) the proxy MUST remove that header field value from the response and
/// forward the result to the location indicated in the next Via header field value. The proxy MUST NOT add
/// to, modify, or remove the message body. Unless specified otherwise, the proxy MUST NOT remove
/// any other header field values. If the address does not match the proxy, the message MUST be silently discarded.
/// </summary>
private void GotResponse(SIPEndPoint localSIPEndPoint, SIPEndPoint remoteEndPoint, SIPResponse sipResponse)
{
try
{
// Used in the proxy monitor messages only, plays no part in response processing.
string fromUser = (sipResponse.Header.From != null) ? sipResponse.Header.From.FromURI.User : null;
string toUser = (sipResponse.Header.To != null) ? sipResponse.Header.To.ToURI.User : null;
string summaryStr = "resp " + sipResponse.Header.CSeqMethod + " from=" + fromUser + ", to=" + toUser + ", " + remoteEndPoint.ToString();
SIPViaHeader topVia = sipResponse.Header.Vias.PopTopViaHeader();
SIPEndPoint outSocket = localSIPEndPoint;
// If the second Via header on the response was also set by this proxy it means the request was originally received and forwarded
// on different sockets. To get the response to travel the same path in reverse it must be forwarded from the proxy socket indicated
// by the second top Via.
if (sipResponse.Header.Vias.Length > 1)
{
SIPViaHeader nextTopVia = sipResponse.Header.Vias.TopViaHeader;
SIPEndPoint nextTopViaSIPEndPoint = SIPEndPoint.ParseSIPEndPoint(nextTopVia.Transport + ":" + nextTopVia.ReceivedFromAddress);
//if (!(PublicIPAddress != null && nextTopVia.ReceivedFromIPAddress != null && nextTopVia.ReceivedFromIPAddress != PublicIPAddress.ToString())
// &&
// (m_sipTransport.IsLocalSIPEndPoint(nextTopViaSIPEndPoint) || (PublicIPAddress != null && nextTopVia.ReceivedFromIPAddress == PublicIPAddress.ToString())))
if(m_sipTransport.IsLocalSIPEndPoint(nextTopViaSIPEndPoint))
{
sipResponse.Header.Vias.PopTopViaHeader();
outSocket = nextTopViaSIPEndPoint;
}
}
bool isFromAppServer = (m_sipCallDispatcherFile != null) ? m_sipCallDispatcherFile.IsAppServerEndPoint(remoteEndPoint) : false;
lock (this)
{
m_compiledScript.DefaultScope.RemoveVariable("sys");
m_compiledScript.DefaultScope.RemoveVariable("isreq");
m_compiledScript.DefaultScope.RemoveVariable("localEndPoint");
m_compiledScript.DefaultScope.RemoveVariable("outSocket");
m_compiledScript.DefaultScope.RemoveVariable("resp");
m_compiledScript.DefaultScope.RemoveVariable("remoteEndPoint");
m_compiledScript.DefaultScope.RemoveVariable("summary");
m_compiledScript.DefaultScope.RemoveVariable("sipMethod");
m_compiledScript.DefaultScope.RemoveVariable("topVia");
m_compiledScript.DefaultScope.RemoveVariable("IsFromAppServer");
m_compiledScript.DefaultScope.SetVariable("sys", m_proxyScriptFacade);
m_compiledScript.DefaultScope.SetVariable("isreq", false);
m_compiledScript.DefaultScope.SetVariable("localEndPoint", localSIPEndPoint);
m_compiledScript.DefaultScope.SetVariable("outSocket", outSocket);
m_compiledScript.DefaultScope.SetVariable("resp", sipResponse);
m_compiledScript.DefaultScope.SetVariable("remoteEndPoint", remoteEndPoint);
m_compiledScript.DefaultScope.SetVariable("summary", summaryStr);
m_compiledScript.DefaultScope.SetVariable("sipMethod", sipResponse.Header.CSeqMethod.ToString());
m_compiledScript.DefaultScope.SetVariable("topVia", topVia);
m_compiledScript.DefaultScope.SetVariable("IsFromAppServer", isFromAppServer);
m_compiledScript.Execute();
}
//if (responseStopwatch.ElapsedMilliseconds > 20)
//{
// logger.Debug("GotResponse processing time=" + responseStopwatch.ElapsedMilliseconds + "ms, script time=" + scriptStopwatch.ElapsedMilliseconds + "ms.");
//}
}
catch (Exception excp)
{
string respExcpError = "Exception SIPProxyCore GotResponse. " + excp.Message;
logger.Error(respExcpError + "\n" + sipResponse.ToString());
SIPMonitorEvent respExcpEvent = new SIPMonitorConsoleEvent(SIPMonitorServerTypesEnum.SIPProxy, SIPMonitorEventTypesEnum.Error, respExcpError, localSIPEndPoint, remoteEndPoint, null);
SendMonitorEvent(respExcpEvent);
throw excp;
}
}
private void UACCallAnswered(ISIPClientUserAgent answeredUAC, SIPResponse answeredResponse)
{
try
{
// Remove the current call from the pending list.
lock (m_switchCalls)
{
m_switchCalls.Remove(answeredUAC);
}
if (m_switchCallTransactions != null && answeredUAC.ServerTransaction != null)
{
m_switchCallTransactions.Add(answeredUAC.ServerTransaction);
}
if (answeredResponse != null && answeredResponse.StatusCode >= 200 && answeredResponse.StatusCode <= 299)
{
#region 2xx final response.
if (!m_callAnswered && !m_commandCancelled)
{
// This is the first call we've got an answer on.
m_callAnswered = true;
m_answeredUAC = answeredUAC;
AnsweredSIPResponse = answeredResponse;
SIPDialogueTransferModesEnum uasTransferMode = SIPDialogueTransferModesEnum.Default;
if (m_answeredUAC.CallDescriptor.TransferMode == SIPDialogueTransferModesEnum.NotAllowed)
{
answeredUAC.SIPDialogue.TransferMode = SIPDialogueTransferModesEnum.NotAllowed;
uasTransferMode = SIPDialogueTransferModesEnum.NotAllowed;
}
else if (m_answeredUAC.CallDescriptor.TransferMode == SIPDialogueTransferModesEnum.BlindPlaceCall)
{
answeredUAC.SIPDialogue.TransferMode = SIPDialogueTransferModesEnum.BlindPlaceCall;
uasTransferMode = SIPDialogueTransferModesEnum.BlindPlaceCall;
}
else if (m_answeredUAC.CallDescriptor.TransferMode == SIPDialogueTransferModesEnum.PassThru)
{
answeredUAC.SIPDialogue.TransferMode = SIPDialogueTransferModesEnum.PassThru;
uasTransferMode = SIPDialogueTransferModesEnum.PassThru;
}
/*else if (m_answeredUAC.CallDescriptor.TransferMode == SIPCallTransferModesEnum.Caller)
{
answeredUAC.SIPDialogue.TransferMode = SIPDialogueTransferModesEnum.NotAllowed;
uasTransferMode = SIPDialogueTransferModesEnum.Allowed;
}
else if (m_answeredUAC.CallDescriptor.TransferMode == SIPCallTransferModesEnum.Callee)
{
answeredUAC.SIPDialogue.TransferMode = SIPDialogueTransferModesEnum.Allowed;
uasTransferMode = SIPDialogueTransferModesEnum.NotAllowed;
}
else if (m_answeredUAC.CallDescriptor.TransferMode == SIPCallTransferModesEnum.Both)
{
answeredUAC.SIPDialogue.TransferMode = SIPDialogueTransferModesEnum.Allowed;
uasTransferMode = SIPDialogueTransferModesEnum.Allowed;
}*/
if (CallAnswered != null)
{
logger.Debug("Transfer mode=" + m_answeredUAC.CallDescriptor.TransferMode + ".");
CallAnswered(answeredResponse.Status, answeredResponse.ReasonPhrase, null, null, answeredResponse.Header.ContentType, answeredResponse.Body, answeredUAC.SIPDialogue, uasTransferMode);
}
// Cancel/hangup and other calls on this leg that are still around.
CancelNotRequiredCallLegs(CallCancelCause.NormalClearing);
}
else
{
// Call already answered or cancelled, hangup (send BYE).
FireProxyLogEvent(new SIPMonitorConsoleEvent(SIPMonitorServerTypesEnum.AppServer, SIPMonitorEventTypesEnum.DialPlan, "Call leg " + answeredUAC.CallDescriptor.Uri + " answered but call was already answered or cancelled, hanging up.", m_username));
SIPDialogue sipDialogue = new SIPDialogue(answeredUAC.ServerTransaction, m_username, m_adminMemberId);
sipDialogue.Hangup(m_sipTransport, m_outboundProxySocket);
}
#endregion
CallLegCompleted();
}
else if (answeredUAC.SIPDialogue != null)
{
// Google Voice calls create the dialogue without using a SIP response.
if (!m_callAnswered && !m_commandCancelled)
{
FireProxyLogEvent(new SIPMonitorConsoleEvent(SIPMonitorServerTypesEnum.AppServer, SIPMonitorEventTypesEnum.DialPlan, "Call leg for Google Voice call to " + answeredUAC.CallDescriptor.Uri + " answered.", m_username));
// This is the first call we've got an answer on.
m_callAnswered = true;
m_answeredUAC = answeredUAC;
if (CallAnswered != null)
{
CallAnswered(SIPResponseStatusCodesEnum.Ok, null, null, null, answeredUAC.SIPDialogue.ContentType, answeredUAC.SIPDialogue.RemoteSDP, answeredUAC.SIPDialogue, SIPDialogueTransferModesEnum.NotAllowed);
}
// Cancel/hangup and other calls on this leg that are still around.
CancelNotRequiredCallLegs(CallCancelCause.NormalClearing);
}
else
{
// Call already answered or cancelled, hangup (send BYE).
FireProxyLogEvent(new SIPMonitorConsoleEvent(SIPMonitorServerTypesEnum.AppServer, SIPMonitorEventTypesEnum.DialPlan, "Call leg for Google Voice call to " + answeredUAC.CallDescriptor.Uri + " answered but call was already answered or cancelled, hanging up.", m_username));
answeredUAC.SIPDialogue.Hangup(m_sipTransport, m_outboundProxySocket);
}
}
else if (answeredResponse != null && answeredResponse.StatusCode >= 300 && answeredResponse.StatusCode <= 399)
{
ProcessRedirect(answeredUAC, answeredResponse);
}
else if (answeredResponse != null)
{
// This call leg failed, record the failure status and reason.
m_lastFailureStatus = answeredResponse.Status;
m_lastFailureReason = answeredResponse.ReasonPhrase;
if (m_switchCallTransactions != null && answeredUAC.ServerTransaction != null)
{
m_switchCallTransactions.Add(answeredUAC.ServerTransaction);
}
CallLegCompleted();
}
}
catch (Exception excp)
{
logger.Error("Exception ForkCall UACCallAnswered. " + excp);
}
}
private int GetUpdatedExpiry(SIPResponse sipResponse)
{
// Find the contact in the list that matches the one being maintained by this agent in order to determine the expiry value.
int serverExpiry = 0;
int headerExpires = sipResponse.Header.Expires;
int contactExpires = -1;
if (sipResponse.Header.Contact != null && sipResponse.Header.Contact.Count > 0)
{
if (sipResponse.Header.Contact.Count == 1)
{
contactExpires = sipResponse.Header.Contact[0].Expires;
}
else
{
foreach (SIPContactHeader contactHeader in sipResponse.Header.Contact)
{
if (contactHeader.ContactURI == m_contactURI)
{
contactExpires = contactHeader.Expires;
break;
}
}
}
}
if (contactExpires != -1)
{
serverExpiry = contactExpires;
}
else if (headerExpires != -1)
{
serverExpiry = headerExpires;
}
if (serverExpiry < REGISTER_MINIMUM_EXPIRY)
{
// Make sure we don't do a 3CX and send registration floods.
return REGISTER_MINIMUM_EXPIRY;
}
else if (serverExpiry > MAX_EXPIRY)
{
return MAX_EXPIRY;
}
else
{
return serverExpiry;
}
}
/// <summary>
/// Used to create a SIP response when it was not possible to parse the incoming SIP request.
/// </summary>
public SIPResponse GetResponse(SIPEndPoint localSIPEndPoint, SIPEndPoint remoteEndPoint, SIPResponseStatusCodesEnum responseCode, string reasonPhrase)
{
try
{
if (localSIPEndPoint == null)
{
localSIPEndPoint = GetDefaultSIPEndPoint();
}
SIPResponse response = new SIPResponse(responseCode, reasonPhrase, localSIPEndPoint);
SIPSchemesEnum sipScheme = (localSIPEndPoint.Protocol == SIPProtocolsEnum.tls) ? SIPSchemesEnum.sips : SIPSchemesEnum.sip;
SIPFromHeader from = new SIPFromHeader(null, new SIPURI(sipScheme, localSIPEndPoint), null);
SIPToHeader to = new SIPToHeader(null, new SIPURI(sipScheme, localSIPEndPoint), null);
int cSeq = 1;
string callId = CallProperties.CreateNewCallId();
response.Header = new SIPHeader(from, to, cSeq, callId);
response.Header.CSeqMethod = SIPMethodsEnum.NONE;
response.Header.Vias.PushViaHeader(new SIPViaHeader(new SIPEndPoint(localSIPEndPoint.Protocol, remoteEndPoint.GetIPEndPoint()), CallProperties.CreateBranchId()));
response.Header.MaxForwards = Int32.MinValue;
response.Header.Allow = ALLOWED_SIP_METHODS;
return response;
}
catch (Exception excp)
{
logger.Error("Exception SIPTransport GetResponse. " + excp.Message);
throw;
}
}
/// <summary>
///
/// </summary>
/// <param name="data"></param>
/// <param name="ringTimeout"></param>
/// <param name="answeredCallLimit"></param>
/// <param name="redirectMode"></param>
/// <param name="clientTransaction"></param>
/// <param name="keepScriptAlive">If false will let the dial plan engine know the script has finished and the call is answered. For applications
/// like Callback which need to have two calls answered it will be true.</param>
/// <returns></returns>
private DialPlanAppResult Dial(
string data,
int ringTimeout,
int answeredCallLimit,
SIPRequest clientRequest,
CRMHeaders contact)
{
if (m_dialPlanContext.IsAnswered)
{
Log("The call has already been answered the Dial command was not processed.");
return DialPlanAppResult.AlreadyAnswered;
}
else if (data.IsNullOrBlank())
{
Log("The dial string cannot be empty when calling Dial.");
return DialPlanAppResult.Error;
}
else if (m_callInitialisationCount > MAX_CALLS_ALLOWED)
{
Log("You have exceeded the maximum allowed calls for a dialplan execution.");
return DialPlanAppResult.Error;
}
else
{
Log("Commencing Dial with: " + data + ".");
DialPlanAppResult result = DialPlanAppResult.Unknown;
m_waitForCallCompleted = new ManualResetEvent(false);
SIPResponseStatusCodesEnum answeredStatus = SIPResponseStatusCodesEnum.None;
string answeredReason = null;
string answeredContentType = null;
string answeredBody = null;
SIPDialogue answeredDialogue = null;
SIPDialogueTransferModesEnum uasTransferMode = SIPDialogueTransferModesEnum.Default;
int numberLegs = 0;
QueueNewCallDelegate queueNewCall = (m_callManager != null) ? m_callManager.QueueNewCall : (QueueNewCallDelegate)null;
m_currentCall = new ForkCall(m_sipTransport, FireProxyLogEvent, queueNewCall, m_dialStringParser, Username, m_adminMemberId, m_outboundProxySocket, m_callManager, m_dialPlanContext, out LastDialled);
m_currentCall.CallProgress += m_dialPlanContext.CallProgress;
m_currentCall.CallFailed += (status, reason, headers) =>
{
LastFailureStatus = status;
LastFailureReason = reason;
result = DialPlanAppResult.Failed;
m_waitForCallCompleted.Set();
};
m_currentCall.CallAnswered += (status, reason, toTag, headers, contentType, body, dialogue, transferMode) =>
{
answeredStatus = status;
answeredReason = reason;
answeredContentType = contentType;
answeredBody = body;
answeredDialogue = dialogue;
uasTransferMode = transferMode;
result = DialPlanAppResult.Answered;
m_waitForCallCompleted.Set();
};
try
{
Queue<List<SIPCallDescriptor>> callsQueue = m_dialStringParser.ParseDialString(
DialPlanContextsEnum.Script,
clientRequest,
data,
m_customSIPHeaders,
m_customContentType,
m_customContent,
m_dialPlanContext.CallersNetworkId,
m_customFromName,
m_customFromUser,
m_customFromHost,
contact,
ServiceLevel);
List<SIPCallDescriptor>[] callListArray = callsQueue.ToArray();
callsQueue.ToList().ForEach((list) => numberLegs += list.Count);
if (numberLegs == 0)
{
Log("The dial string did not result in any call legs.");
return DialPlanAppResult.Error;
}
else
{
m_callInitialisationCount += numberLegs;
if (m_callInitialisationCount > MAX_CALLS_ALLOWED)
{
Log("You have exceeded the maximum allowed calls for a dialplan execution.");
return DialPlanAppResult.Error;
}
}
m_currentCall.Start(callsQueue);
// Wait for an answer.
if (ringTimeout <= 0 || ringTimeout * 1000 > m_maxRingTime)
{
ringTimeout = m_maxRingTime;
}
else
{
ringTimeout = ringTimeout * 1000;
}
ExtendScriptTimeout(ringTimeout / 1000 + DEFAULT_CREATECALL_RINGTIME);
DateTime startTime = DateTime.Now;
if (m_waitForCallCompleted.WaitOne(ringTimeout, false))
{
if (!m_clientCallCancelled)
{
if (result == DialPlanAppResult.Answered)
{
// The call limit duration is only used if there hasn't already been a per leg duration set on the call.
if (answeredCallLimit > 0 && answeredDialogue.CallDurationLimit == 0)
{
answeredDialogue.CallDurationLimit = answeredCallLimit;
}
m_dialPlanContext.CallAnswered(answeredStatus, answeredReason, null, null, answeredContentType, answeredBody, answeredDialogue, uasTransferMode);
// Dial plan script stops once there is an answered call to bridge to or the client call is cancelled.
Log("Dial command was successfully answered in " + DateTime.Now.Subtract(startTime).TotalSeconds.ToString("0.00") + "s.");
// Do some Google Analytics call tracking.
if (answeredDialogue.RemoteUserField != null)
{
SendGoogleAnalyticsEvent("Call", "Answered", answeredDialogue.RemoteUserField.URI.Host, 1);
}
m_executingScript.StopExecution();
}
else if (result == DialPlanAppResult.Failed)
{
// Check whether any of the responses were redirects.
if (LastDialled != null && LastDialled.Count > 0)
{
var redirect = (from trans in LastDialled
where trans.TransactionFinalResponse != null && trans.TransactionFinalResponse.StatusCode >= 300 &&
trans.TransactionFinalResponse.StatusCode <= 399 && trans.TransactionFinalResponse.Header.Contact != null
&& trans.TransactionFinalResponse.Header.Contact.Count > 0
select trans.TransactionFinalResponse).FirstOrDefault();
if (redirect != null)
{
m_redirectResponse = redirect;
m_redirectURI = RedirectResponse.Header.Contact[0].ContactURI;
result = DialPlanAppResult.Redirect;
}
}
}
}
}
else
{
if (!m_clientCallCancelled)
{
// Call timed out.
m_currentCall.CancelNotRequiredCallLegs(CallCancelCause.TimedOut);
result = DialPlanAppResult.TimedOut;
}
}
if (m_clientCallCancelled)
{
Log("Dial command was halted by cancellation of client call after " + DateTime.Now.Subtract(startTime).TotalSeconds.ToString("#.00") + "s.");
m_executingScript.StopExecution();
}
return result;
}
catch (ThreadAbortException)
{
return DialPlanAppResult.Unknown;
}
catch (Exception excp)
{
logger.Error("Exception DialPlanScriptFacade Dial. " + excp.Message);
return DialPlanAppResult.Error;
}
}
}
private void UACInviteTransaction_TransactionInformationResponseReceived(SIPEndPoint localSIPEndPoint, SIPEndPoint remoteEndPoint, SIPTransaction sipTransaction, SIPResponse sipResponse)
{
try
{
UACInviteTransactionInformationResponseReceived?.Invoke(localSIPEndPoint, remoteEndPoint, sipTransaction, sipResponse);
if (sipResponse.StatusCode > 100 && sipResponse.StatusCode <= 199 && sipResponse.Header.RSeq > 0)
{
// Send a PRACK for this provisional response.
SendPRackRequest(sipResponse);
}
if (CDR != null)
{
SIPEndPoint localEP = SIPEndPoint.TryParse(sipResponse.Header.ProxyReceivedOn) ?? localSIPEndPoint;
SIPEndPoint remoteEP = SIPEndPoint.TryParse(sipResponse.Header.ProxyReceivedFrom) ?? remoteEndPoint;
CDR.Progress(sipResponse.Status, sipResponse.ReasonPhrase, localEP, remoteEP);
}
}
catch (Exception excp)
{
logger.LogError("Exception UACInviteTransaction_TransactionInformationResponseReceived. " + excp.Message);
}
}
private void FireSIPResponseOutTraceEvent(SIPEndPoint localSIPEndPoint, SIPEndPoint remoteEndPoint, SIPResponse sipResponse)
{
try
{
if (SIPResponseOutTraceEvent != null)
{
SIPResponseOutTraceEvent(localSIPEndPoint, remoteEndPoint, sipResponse);
}
}
catch (Exception excp)
{
logger.Error("Exception FireSIPResponseOutTraceEvent. " + excp.Message);
}
}
public void SendResponse(SIPResponse finalResponse)
{
base.SendFinalResponse(finalResponse);
}
private Task <SocketError> SIPNonInviteTransaction_TransactionFinalResponseReceived(SIPEndPoint localSIPEndPoint,
SIPEndPoint remoteEndPoint, SIPTransaction sipTransaction, SIPResponse sipResponse)
{
return(NonInviteTransactionFinalResponseReceived?.Invoke(localSIPEndPoint, remoteEndPoint, this,
sipResponse));
}
public void GotResponse(SIPEndPoint localSIPEndPoint, SIPEndPoint remoteEndPoint, SIPResponse sipResponse)
{
if (TransactionState == SIPTransactionStatesEnum.Completed || TransactionState == SIPTransactionStatesEnum.Confirmed)
{
FireTransactionTraceMessage("Received Duplicate Response " + localSIPEndPoint.ToString() + "<-" + remoteEndPoint + m_crLF + sipResponse.ToString());
if (sipResponse.Header.CSeqMethod == SIPMethodsEnum.INVITE)
{
if (sipResponse.StatusCode >= 100 && sipResponse.StatusCode <= 199)
{
// Ignore info response on completed transaction.
}
else
{
ResendAckRequest();
}
}
if (TransactionDuplicateResponse != null)
{
TransactionDuplicateResponse(localSIPEndPoint, remoteEndPoint, this, sipResponse);
}
}
else
{
FireTransactionTraceMessage("Received Response " + localSIPEndPoint.ToString() + "<-" + remoteEndPoint + m_crLF + sipResponse.ToString());
if (sipResponse.StatusCode >= 100 && sipResponse.StatusCode <= 199)
{
UpdateTransactionState(SIPTransactionStatesEnum.Proceeding);
TransactionInformationResponseReceived(localSIPEndPoint, remoteEndPoint, this, sipResponse);
}
else
{
m_transactionFinalResponse = sipResponse;
UpdateTransactionState(SIPTransactionStatesEnum.Completed);
TransactionFinalResponseReceived(localSIPEndPoint, remoteEndPoint, this, sipResponse);
}
}
}
public void GotResponse(SIPEndPoint localSIPEndPoint, SIPEndPoint remoteEndPoint, SIPResponse sipResponse)
{
if (TransactionState == SIPTransactionStatesEnum.Completed || TransactionState == SIPTransactionStatesEnum.Confirmed)
{
FireTransactionTraceMessage($"Transaction received duplicate response {localSIPEndPoint.ToString()}<-{remoteEndPoint}: {sipResponse.ShortDescription}");
if (sipResponse.Header.CSeqMethod == SIPMethodsEnum.INVITE)
{
if (sipResponse.StatusCode > 100 && sipResponse.StatusCode <= 199)
{
ResendPrackRequest();
}
else
{
ResendAckRequest();
}
}
TransactionDuplicateResponse?.Invoke(localSIPEndPoint, remoteEndPoint, this, sipResponse);
}
else
{
FireTransactionTraceMessage($"Transaction received Response {localSIPEndPoint.ToString()}<-{remoteEndPoint}: {sipResponse.ShortDescription}");
if (sipResponse.StatusCode >= 100 && sipResponse.StatusCode <= 199)
{
UpdateTransactionState(SIPTransactionStatesEnum.Proceeding);
TransactionInformationResponseReceived(localSIPEndPoint, remoteEndPoint, this, sipResponse);
}
else
{
m_transactionFinalResponse = sipResponse;
UpdateTransactionState(SIPTransactionStatesEnum.Completed);
TransactionFinalResponseReceived(localSIPEndPoint, remoteEndPoint, this, sipResponse);
}
}
}
private void UACInviteTransaction_TransactionFinalResponseReceived(SIPEndPoint localSIPEndPoint, SIPEndPoint remoteEndPoint, SIPTransaction sipTransaction, SIPResponse sipResponse)
{
try
{
// BranchId for 2xx responses needs to be a new one, non-2xx final responses use same one as original request.
SIPRequest ackRequest = null;
if (sipResponse.StatusCode >= 200 && sipResponse.StatusCode < 299)
{
if (sipResponse.Header.To != null)
{
m_remoteTag = sipResponse.Header.To.ToTag;
}
SIPURI ackURI = m_transactionRequest.URI;
if (sipResponse.Header.Contact != null && sipResponse.Header.Contact.Count > 0)
{
ackURI = sipResponse.Header.Contact[0].ContactURI;
// Don't mangle private contacts if there is a Record-Route header. If a proxy is putting private IP's in a Record-Route header that's its problem.
if ((sipResponse.Header.RecordRoutes == null || sipResponse.Header.RecordRoutes.Length == 0) &&
IPSocket.IsPrivateAddress(ackURI.Host) && !sipResponse.Header.ProxyReceivedFrom.IsNullOrBlank())
{
// Setting the Proxy-ReceivedOn header is how an upstream proxy will let an agent know it should mangle the contact.
SIPEndPoint remoteUASSIPEndPoint = SIPEndPoint.ParseSIPEndPoint(sipResponse.Header.ProxyReceivedFrom);
ackURI.Host = remoteUASSIPEndPoint.GetIPEndPoint().ToString();
}
}
// ACK for 2xx response needs to be a new transaction and gets routed based on SIP request fields.
ackRequest = GetNewTransactionACKRequest(sipResponse, ackURI, LocalSIPEndPoint);
base.SendRequest(ackRequest);
}
else
{
// ACK for non 2xx response is part of the INVITE transaction and gets routed to the same endpoint as the INVITE.
ackRequest = GetInTransactionACKRequest(sipResponse, m_transactionRequest.URI, LocalSIPEndPoint);
base.SendRequest(RemoteEndPoint, ackRequest);
}
if (UACInviteTransactionFinalResponseReceived != null)
{
UACInviteTransactionFinalResponseReceived(localSIPEndPoint, remoteEndPoint, sipTransaction, sipResponse);
}
if (CDR != null)
{
SIPEndPoint localEP = SIPEndPoint.TryParse(sipResponse.Header.ProxyReceivedOn) ?? localSIPEndPoint;
SIPEndPoint remoteEP = SIPEndPoint.TryParse(sipResponse.Header.ProxyReceivedFrom) ?? remoteEndPoint;
CDR.Answered(sipResponse.StatusCode, sipResponse.Status, sipResponse.ReasonPhrase, localEP, remoteEP);
}
}
catch (Exception excp)
{
logger.Error("Exception UACInviteTransaction_TransactionFinalResponseReceived. " + excp.Message);
}
}
private void SendResponse(SIPChannel sipChannel, SIPEndPoint dstEndPoint, SIPResponse sipResponse)
{
try
{
if (dstEndPoint != null && dstEndPoint.Address.Equals(BlackholeAddress))
{
// Ignore packet, it's destined for the blackhole.
return;
}
if (m_sipChannels.Count == 0)
{
throw new ApplicationException("No channels are configured in the SIP transport layer. The response could not be sent.");
}
sipResponse.Header.ContentLength = (sipResponse.Body.NotNullOrBlank()) ? Encoding.UTF8.GetByteCount(sipResponse.Body) : 0;
sipChannel.Send(dstEndPoint.GetIPEndPoint(), Encoding.UTF8.GetBytes(sipResponse.ToString()));
if (SIPRequestOutTraceEvent != null)
{
FireSIPResponseOutTraceEvent(sipChannel.SIPChannelEndPoint, dstEndPoint, sipResponse);
}
}
catch (ApplicationException appExcp)
{
logger.Warn("ApplicationException SIPTransport SendResponse. " + appExcp.Message);
}
}
private void SIPNonInviteTransaction_TransactionFinalResponseReceived(SIPEndPoint localSIPEndPoint, SIPEndPoint remoteEndPoint, SIPTransaction sipTransaction, SIPResponse sipResponse)
{
if (NonInviteTransactionFinalResponseReceived != null)
{
NonInviteTransactionFinalResponseReceived(localSIPEndPoint, remoteEndPoint, this, sipResponse);
}
}
public void SendResponse(SIPResponse sipResponse)
{
if (sipResponse.LocalSIPEndPoint != null && sipResponse.LocalSIPEndPoint.Address.Equals(BlackholeAddress))
{
// Ignore packet, it's destined for the blackhole.
return;
}
if (m_sipChannels.Count == 0)
{
throw new ApplicationException("No channels are configured in the SIP transport layer. The response could not be sent.");
}
//SIPChannel sipChannel = GetChannelForSocketId(sipResponse.SocketId);
SIPViaHeader topViaHeader = sipResponse.Header.Vias.TopViaHeader;
if (topViaHeader == null)
{
logger.Warn("There was no top Via header on a SIP response from " + sipResponse.RemoteSIPEndPoint + " when attempting to send it, response dropped.");
//logger.Warn(sipResponse.ToString());
}
else
{
SIPChannel sipChannel = FindSIPChannel(sipResponse.LocalSIPEndPoint);
sipChannel = sipChannel ?? GetDefaultChannel(topViaHeader.Transport);
if (sipChannel != null)
{
SendResponse(sipChannel, sipResponse);
}
else
{
throw new ApplicationException("Could not find a SIP channel to send SIP Response to " + topViaHeader.ReceivedFromAddress + ".");
}
}
}
private void UASInviteTransaction_TransactionResponseReceived(SIPEndPoint localSIPEndPoint, SIPEndPoint remoteEndPoint, SIPTransaction sipTransaction, SIPResponse sipResponse)
{
logger.LogWarning("UASInviteTransaction received unexpected response, " + sipResponse.ReasonPhrase + " from " + remoteEndPoint.ToString() + ", ignoring.");
}
public void MagicJackAuthUnitTest()
{
Console.WriteLine("--> " + System.Reflection.MethodBase.GetCurrentMethod().Name);
string nonce = "8765abc4_32190";
SIPResponse authReqdResponse = new SIPResponse(SIPResponseStatusCodesEnum.Unauthorised, null, null);
authReqdResponse.Header.CallId = "9876ABC56738DD43";
authReqdResponse.Header.AuthenticationHeader = SIPAuthenticationHeader.ParseSIPAuthenticationHeader(SIPAuthorisationHeadersEnum.WWWAuthenticate, "Digest nonce=\"" + nonce + "\",realm=\"stratus.com\",algorithm=MD5");
authReqdResponse.Header.AuthenticationHeader.SIPDigest.SetCredentials("username", "password", "sip:[email protected]", SIPMethodsEnum.INVITE.ToString());
Assert.IsTrue(SIPProviderMagicJack.IsMagicJackRequest(authReqdResponse), "The SIP Response was not correctly identified as being for a MagicJack request.");
string mjNonce = GetNonce(authReqdResponse.Header.AuthenticationHeader.SIPDigest.Nonce, authReqdResponse.Header.CallId);
SIPAuthenticationHeader mjAuthheader = SIPProviderMagicJack.GetAuthenticationHeader(authReqdResponse);
Assert.IsTrue(mjNonce == "8765abc4_32190_65CB38DA", "The MagicJack nonce was not correctly generated.");
Assert.IsTrue(authReqdResponse.Header.AuthenticationHeader.SIPDigest.Nonce == nonce, "The nonce set in the MagicJack response was not preserved correctly.");
Console.WriteLine("-----------------------------------------");
}
private Task <SocketError> UASInviteTransaction_TransactionResponseReceived(SIPEndPoint localSIPEndPoint, SIPEndPoint remoteEndPoint, SIPTransaction sipTransaction, SIPResponse sipResponse)
{
logger.LogWarning("UASInviteTransaction received unexpected response, " + sipResponse.ReasonPhrase + " from " + remoteEndPoint.ToString() + ", ignoring.");
return(Task.FromResult(SocketError.Fault));
}
public new Task <SocketError> SendProvisionalResponse(SIPResponse sipResponse)
{
CDR?.Progress(sipResponse.Status, sipResponse.ReasonPhrase, null, null);
return(base.SendProvisionalResponse(sipResponse));
}
public new void SendFinalResponse(SIPResponse sipResponse)
{
CDR?.Answered(sipResponse.StatusCode, sipResponse.Status, sipResponse.ReasonPhrase, null, null);
base.SendFinalResponse(sipResponse);
}
private int GetUpdatedExpiryForIntervalTooBrief(SIPResponse sipResponse)
{
int newExpiry = sipResponse.Header.MinExpires;
if (newExpiry != 0 && newExpiry > m_expiry)
{
if(newExpiry > MAX_EXPIRY)
{
return MAX_EXPIRY;
}
else
{
return newExpiry;
}
}
else if(m_expiry < MAX_EXPIRY)
{
return m_expiry * 2;
}
return m_expiry;
}
public Task <SocketError> GotResponse(SIPEndPoint localSIPEndPoint, SIPEndPoint remoteEndPoint, SIPResponse sipResponse)
{
if (TransactionState == SIPTransactionStatesEnum.Completed || TransactionState == SIPTransactionStatesEnum.Confirmed)
{
FireTransactionTraceMessage($"Transaction received duplicate response {localSIPEndPoint.ToString()}<-{remoteEndPoint}: {sipResponse.ShortDescription}");
TransactionDuplicateResponse?.Invoke(localSIPEndPoint, remoteEndPoint, this, sipResponse);
if (sipResponse.Header.CSeqMethod == SIPMethodsEnum.INVITE)
{
if (sipResponse.StatusCode > 100 && sipResponse.StatusCode <= 199)
{
return(ResendPrackRequest());
}
else
{
return(ResendAckRequest());
}
}
else
{
return(Task.FromResult(SocketError.Success));
}
}
else
{
FireTransactionTraceMessage($"Transaction received Response {localSIPEndPoint.ToString()}<-{remoteEndPoint}: {sipResponse.ShortDescription}");
if (sipResponse.StatusCode >= 100 && sipResponse.StatusCode <= 199)
{
UpdateTransactionState(SIPTransactionStatesEnum.Proceeding);
return(TransactionInformationResponseReceived(localSIPEndPoint, remoteEndPoint, this, sipResponse));
}
else
{
m_transactionFinalResponse = sipResponse;
if (TransactionType == SIPTransactionTypesEnum.NonInvite)
{
// No ACK's for non-INVITE's so go straight to confirmed.
UpdateTransactionState(SIPTransactionStatesEnum.Confirmed);
}
else
{
UpdateTransactionState(SIPTransactionStatesEnum.Completed);
}
return(TransactionFinalResponseReceived(localSIPEndPoint, remoteEndPoint, this, sipResponse));
}
}
}
public SIPEndPoint LookupTransactionID(SIPResponse sipResponse)
{
return LookupTransactionID(sipResponse.Header.CallId);
}
private void UACInviteTransaction_TransactionInformationResponseReceived(SIPEndPoint localSIPEndPoint, SIPEndPoint remoteEndPoint, SIPTransaction sipTransaction, SIPResponse sipResponse)
{
try
{
if (UACInviteTransactionInformationResponseReceived != null)
{
UACInviteTransactionInformationResponseReceived(localSIPEndPoint, remoteEndPoint, sipTransaction, sipResponse);
}
if (CDR != null)
{
SIPEndPoint localEP = SIPEndPoint.TryParse(sipResponse.Header.ProxyReceivedOn) ?? localSIPEndPoint;
SIPEndPoint remoteEP = SIPEndPoint.TryParse(sipResponse.Header.ProxyReceivedFrom) ?? remoteEndPoint;
CDR.Progress(sipResponse.Status, sipResponse.ReasonPhrase, localEP, remoteEP);
}
}
catch (Exception excp)
{
logger.Error("Exception UACInviteTransaction_TransactionInformationResponseReceived. " + excp.Message);
}
}
private void CallProgress(SIPResponseStatusCodesEnum progressStatus, string reasonPhrase, string[] customHeaders, string progressContentType, string progressBody, ISIPClientUserAgent uac)
{
SIPResponse progressResponse = new SIPResponse(progressStatus, reasonPhrase, null);
CallRinging(this, progressResponse);
}
private void UACInviteTransaction_TransactionFinalResponseReceived(SIPEndPoint localSIPEndPoint, SIPEndPoint remoteEndPoint, SIPTransaction sipTransaction, SIPResponse sipResponse)
{
try
{
// BranchId for 2xx responses needs to be a new one, non-2xx final responses use same one as original request.
if (sipResponse.StatusCode >= 200 && sipResponse.StatusCode < 299)
{
if (_sendOkAckManually == false)
{
Send2xxAckRequest(null, null);
}
}
else
{
// ACK for non 2xx response is part of the INVITE transaction and gets routed to the same endpoint as the INVITE.
var ackRequest = GetInTransactionACKRequest(sipResponse, m_transactionRequest.URI, LocalSIPEndPoint);
base.SendRequest(RemoteEndPoint, ackRequest);
}
if (UACInviteTransactionFinalResponseReceived != null)
{
UACInviteTransactionFinalResponseReceived(localSIPEndPoint, remoteEndPoint, sipTransaction, sipResponse);
}
if (CDR != null)
{
SIPEndPoint localEP = SIPEndPoint.TryParse(sipResponse.Header.ProxyReceivedOn) ?? localSIPEndPoint;
SIPEndPoint remoteEP = SIPEndPoint.TryParse(sipResponse.Header.ProxyReceivedFrom) ?? remoteEndPoint;
CDR.Answered(sipResponse.StatusCode, sipResponse.Status, sipResponse.ReasonPhrase, localEP, remoteEP);
}
}
catch (Exception excp)
{
logger.Error("Exception UACInviteTransaction_TransactionFinalResponseReceived. " + excp.Message);
}
}
/// <summary>
/// New transaction ACK requests are for 2xx responses, i.e. INVITE accepted and dialogue being created.
/// </summary>
/// <remarks>
/// From RFC 3261 Chapter 17.1.1.3 - ACK for non-2xx final responses
///
/// IMPORTANT:
/// an ACK for a non-2xx response will also have the same branch ID as the INVITE whose response it acknowledges.
///
/// The ACK request constructed by the client transaction MUST contain
/// values for the Call-ID, From, and Request-URI that are equal to the
/// values of those header fields in the request passed to the transport
/// by the client transaction (call this the "original request"). The To
/// header field in the ACK MUST equal the To header field in the
/// response being acknowledged, and therefore will usually differ from
/// the To header field in the original request by the addition of the
/// tag parameter. The ACK MUST contain a single Via header field, and
/// this MUST be equal to the top Via header field of the original
/// request. The CSeq header field in the ACK MUST contain the same
/// value for the sequence number as was present in the original request,
/// but the method parameter MUST be equal to "ACK".
///
/// If the INVITE request whose response is being acknowledged had Route
/// header fields, those header fields MUST appear in the ACK. This is
/// to ensure that the ACK can be routed properly through any downstream
/// stateless proxies.
///
/// From RFC 3261 Chapter 13.2.2.4 - ACK for 2xx final responses
///
/// IMPORTANT:
/// an ACK for a 2xx final response is a new transaction and has a new branch ID.
///
/// The UAC core MUST generate an ACK request for each 2xx received from
/// the transaction layer. The header fields of the ACK are constructed
/// in the same way as for any request sent within a dialog (see Section
/// 12) with the exception of the CSeq and the header fields related to
/// authentication. The sequence number of the CSeq header field MUST be
/// the same as the INVITE being acknowledged, but the CSeq method MUST
/// be ACK. The ACK MUST contain the same credentials as the INVITE. If
/// the 2xx contains an offer (based on the rules above), the ACK MUST
/// carry an answer in its body. If the offer in the 2xx response is not
/// acceptable, the UAC core MUST generate a valid answer in the ACK and
/// then send a BYE immediately.
/// </remarks>
private SIPRequest GetNewTransactionACKRequest(SIPResponse sipResponse, SIPURI ackURI, SIPEndPoint localSIPEndPoint)
{
SIPRequest ackRequest = new SIPRequest(SIPMethodsEnum.ACK, ackURI.ToString());
ackRequest.LocalSIPEndPoint = localSIPEndPoint;
SIPHeader header = new SIPHeader(TransactionRequest.Header.From, sipResponse.Header.To, sipResponse.Header.CSeq, sipResponse.Header.CallId);
header.CSeqMethod = SIPMethodsEnum.ACK;
header.AuthenticationHeader = TransactionRequest.Header.AuthenticationHeader;
header.ProxySendFrom = base.TransactionRequest.Header.ProxySendFrom;
if (sipResponse.Header.RecordRoutes != null)
{
header.Routes = sipResponse.Header.RecordRoutes.Reversed();
}
ackRequest.Header = header;
SIPViaHeader viaHeader = new SIPViaHeader(localSIPEndPoint, CallProperties.CreateBranchId());
ackRequest.Header.Vias.PushViaHeader(viaHeader);
return ackRequest;
}
private void SIPCancelTransaction_TransactionFinalResponseReceived(SIPEndPoint localSIPEndPoint, SIPEndPoint remoteEndPoint, SIPTransaction sipTransaction, SIPResponse sipResponse)
{
if (sipResponse.StatusCode < 200)
{
logger.LogWarning("A SIP CANCEL transaction received an unexpected SIP information response " + sipResponse.ReasonPhrase + ".");
}
else
{
if (CancelTransactionFinalResponseReceived != null)
{
CancelTransactionFinalResponseReceived(localSIPEndPoint, remoteEndPoint, sipTransaction, sipResponse);
}
}
}
private void UACInviteTransaction_TransactionInformationResponseReceived(SIPEndPoint localSIPEndPoint, SIPEndPoint remoteEndPoint, SIPTransaction sipTransaction, SIPResponse sipResponse)
{
try
{
if (UACInviteTransactionInformationResponseReceived != null)
{
UACInviteTransactionInformationResponseReceived(localSIPEndPoint, remoteEndPoint, sipTransaction, sipResponse);
}
if (CDR != null)
{
SIPEndPoint localEP = SIPEndPoint.TryParse(sipResponse.Header.ProxyReceivedOn) ?? localSIPEndPoint;
SIPEndPoint remoteEP = SIPEndPoint.TryParse(sipResponse.Header.ProxyReceivedFrom) ?? remoteEndPoint;
CDR.Progress(sipResponse.Status, sipResponse.ReasonPhrase, localEP, remoteEP);
}
}
catch (Exception excp)
{
logger.Error("Exception UACInviteTransaction_TransactionInformationResponseReceived. " + excp.Message);
}
}
public bool Exists(SIPResponse sipResponse)
{
return(GetTransaction(sipResponse) != null);
}
private void SendResponse(SIPChannel sipChannel, SIPResponse sipResponse)
{
if (m_sipChannels.Count == 0)
{
throw new ApplicationException("No channels are configured in the SIP transport layer. The response could not be sent.");
}
SIPViaHeader topVia = sipResponse.Header.Vias.TopViaHeader;
SIPDNSLookupResult lookupResult = GetHostEndPoint(topVia.ReceivedFromAddress, false);
if (lookupResult.LookupError != null)
{
throw new ApplicationException("Could not resolve destination for response.\n" + sipResponse.ToString());
}
else if (lookupResult.Pending)
{
// Ignore this response transmission and wait for the transaction retransmit mechanism to try again when DNS will have hopefully resolved the end point.
return;
}
else
{
SIPEndPoint dstEndPoint = lookupResult.GetSIPEndPoint();
if (dstEndPoint != null && dstEndPoint.Address.Equals(BlackholeAddress))
{
// Ignore packet, it's destined for the blackhole.
return;
}
else if (dstEndPoint != null)
{
SendResponse(sipChannel, new SIPEndPoint(topVia.Transport, dstEndPoint.GetIPEndPoint()), sipResponse);
}
else
{
throw new ApplicationException("SendResponse could not send a response as no end point was resolved.\n" + sipResponse.ToString());
}
}
}
private async Task <SocketError> UACInviteTransaction_TransactionInformationResponseReceived(SIPEndPoint localSIPEndPoint, SIPEndPoint remoteEndPoint, SIPTransaction sipTransaction, SIPResponse sipResponse)
{
try
{
if (sipResponse.StatusCode > 100 && sipResponse.StatusCode <= 199)
{
if (sipResponse.Header.RSeq > 0)
{
// Send a PRACK for this provisional response.
PRackRequest = GetPRackRequest(sipResponse);
await SendRequestAsync(PRackRequest);
}
}
if (CDR != null)
{
SIPEndPoint localEP = SIPEndPoint.TryParse(sipResponse.Header.ProxyReceivedOn) ?? localSIPEndPoint;
SIPEndPoint remoteEP = SIPEndPoint.TryParse(sipResponse.Header.ProxyReceivedFrom) ?? remoteEndPoint;
CDR.Progress(sipResponse.Status, sipResponse.ReasonPhrase, localEP, remoteEP);
}
return(await UACInviteTransactionInformationResponseReceived?.Invoke(localSIPEndPoint, remoteEndPoint, sipTransaction, sipResponse));;
}
catch (Exception excp)
{
logger.LogError("Exception UACInviteTransaction_TransactionInformationResponseReceived. " + excp.Message);
return(SocketError.Fault);
}
}
public static SIPResponse GetResponse(SIPRequest sipRequest, SIPResponseStatusCodesEnum responseCode, string reasonPhrase)
{
try
{
SIPResponse response = new SIPResponse(responseCode, reasonPhrase, sipRequest.LocalSIPEndPoint);
if (reasonPhrase != null)
{
response.ReasonPhrase = reasonPhrase;
}
SIPHeader requestHeader = sipRequest.Header;
SIPFromHeader from = (requestHeader == null || requestHeader.From != null) ? requestHeader.From : new SIPFromHeader(null, new SIPURI(sipRequest.URI.Scheme, sipRequest.LocalSIPEndPoint), null);
SIPToHeader to = (requestHeader == null || requestHeader.To != null) ? requestHeader.To : new SIPToHeader(null, new SIPURI(sipRequest.URI.Scheme, sipRequest.LocalSIPEndPoint), null);
int cSeq = (requestHeader == null || requestHeader.CSeq != -1) ? requestHeader.CSeq : 1;
string callId = (requestHeader == null || requestHeader.CallId != null) ? requestHeader.CallId : CallProperties.CreateNewCallId();
response.Header = new SIPHeader(from, to, cSeq, callId);
response.Header.CSeqMethod = (requestHeader != null) ? requestHeader.CSeqMethod : SIPMethodsEnum.NONE;
if (requestHeader == null || requestHeader.Vias == null || requestHeader.Vias.Length == 0)
{
response.Header.Vias.PushViaHeader(new SIPViaHeader(sipRequest.RemoteSIPEndPoint, CallProperties.CreateBranchId()));
}
else
{
response.Header.Vias = requestHeader.Vias;
}
response.Header.MaxForwards = Int32.MinValue;
response.Header.Allow = ALLOWED_SIP_METHODS;
return response;
}
catch (Exception excp)
{
logger.Error("Exception SIPTransport GetResponse. " + excp.Message);
throw excp;
}
}
private async Task <SocketError> UACInviteTransaction_TransactionFinalResponseReceived(SIPEndPoint localSIPEndPoint, SIPEndPoint remoteEndPoint, SIPTransaction sipTransaction, SIPResponse sipResponse)
{
try
{
DeliveryPending = false;
// BranchId for 2xx responses needs to be a new one, non-2xx final responses use same one as original request.
if (sipResponse.StatusCode >= 200 && sipResponse.StatusCode < 299)
{
if (_sendOkAckManually == false)
{
AckRequest = Get2xxAckRequest(null, null);
await SendRequestAsync(AckRequest);
}
}
else
{
// ACK for non 2xx response is part of the INVITE transaction and gets routed to the same endpoint as the INVITE.
AckRequest = GetInTransactionACKRequest(sipResponse, m_transactionRequest.URI);
await SendRequestAsync(AckRequest);
}
if (CDR != null)
{
SIPEndPoint localEP = SIPEndPoint.TryParse(sipResponse.Header.ProxyReceivedOn) ?? localSIPEndPoint;
SIPEndPoint remoteEP = SIPEndPoint.TryParse(sipResponse.Header.ProxyReceivedFrom) ?? remoteEndPoint;
CDR.Answered(sipResponse.StatusCode, sipResponse.Status, sipResponse.ReasonPhrase, localEP, remoteEP);
}
return(await UACInviteTransactionFinalResponseReceived?.Invoke(localSIPEndPoint, remoteEndPoint, sipTransaction, sipResponse));
}
catch (Exception excp)
{
logger.LogError($"Exception UACInviteTransaction_TransactionFinalResponseReceived. {excp.Message}");
return(SocketError.Fault);
}
}
public void SendResponse(SIPEndPoint dstEndPoint, SIPResponse sipResponse)
{
if (dstEndPoint != null && dstEndPoint.Address.Equals(BlackholeAddress))
{
// Ignore packet, it's destined for the blackhole.
}
else
{
if (m_sipChannels.Count == 0)
{
throw new ApplicationException("No channels are configured in the SIP transport layer. The response could not be sent.");
}
SIPChannel sipChannel = FindSIPChannel(sipResponse.LocalSIPEndPoint);
sipChannel = sipChannel ?? GetDefaultChannel(dstEndPoint.Protocol);
if (sipChannel != null)
{
SendResponse(sipChannel, dstEndPoint, sipResponse);
}
else
{
logger.Warn("Could not find channel to send SIP Response in SendResponse.");
}
}
}
/// <summary>
/// New transaction ACK requests are for 2xx responses, i.e. INVITE accepted and dialogue being created.
/// </summary>
/// <remarks>
/// From RFC 3261 Chapter 13.2.2.4 - ACK for 2xx final responses
///
/// IMPORTANT:
/// an ACK for a 2xx final response is a new transaction and has a new branch ID.
///
/// The UAC core MUST generate an ACK request for each 2xx received from
/// the transaction layer. The header fields of the ACK are constructed
/// in the same way as for any request sent within a dialog (see Section
/// 12) with the exception of the CSeq and the header fields related to
/// authentication. The sequence number of the CSeq header field MUST be
/// the same as the INVITE being acknowledged, but the CSeq method MUST
/// be ACK. The ACK MUST contain the same credentials as the INVITE. If
/// the 2xx contains an offer (based on the rules above), the ACK MUST
/// carry an answer in its body. If the offer in the 2xx response is not
/// acceptable, the UAC core MUST generate a valid answer in the ACK and
/// then send a BYE immediately.
/// </remarks>
private SIPRequest GetNewTransactionAcknowledgeRequest(SIPMethodsEnum method, SIPResponse sipResponse, SIPURI ackURI)
{
SIPRequest ackRequest = new SIPRequest(method, ackURI.ToString());
ackRequest.SetSendFromHints(sipResponse.LocalSIPEndPoint);
SIPHeader header = new SIPHeader(TransactionRequest.Header.From, sipResponse.Header.To, sipResponse.Header.CSeq, sipResponse.Header.CallId);
header.CSeqMethod = method;
header.AuthenticationHeader = TransactionRequest.Header.AuthenticationHeader;
header.ProxySendFrom = base.TransactionRequest.Header.ProxySendFrom;
// If the UAS supplies a desired Record-Route list use that first. Otherwise fall back to any Route list used in the original transaction.
if (sipResponse.Header.RecordRoutes != null)
{
header.Routes = sipResponse.Header.RecordRoutes.Reversed();
}
else if (base.TransactionRequest.Header.Routes != null)
{
header.Routes = base.TransactionRequest.Header.Routes;
}
ackRequest.Header = header;
ackRequest.Header.Vias.PushViaHeader(SIPViaHeader.GetDefaultSIPViaHeader());
return(ackRequest);
}
private void SIPNonInviteTransaction_TransactionFinalResponseReceived(SIPEndPoint localSIPEndPoint, SIPEndPoint remoteEndPoint, SIPTransaction sipTransaction, SIPResponse sipResponse)
{
if (NonInviteTransactionFinalResponseReceived != null)
{
NonInviteTransactionFinalResponseReceived(localSIPEndPoint, remoteEndPoint, this, sipResponse);
}
}
private void ServerResponseReceived(SIPEndPoint localSIPEndPoint, SIPEndPoint remoteEndPoint, SIPTransaction sipTransaction, SIPResponse sipResponse)
{
try
{
string reasonPhrase = (sipResponse.ReasonPhrase.IsNullOrBlank()) ? sipResponse.Status.ToString() : sipResponse.ReasonPhrase;
Log_External(new SIPMonitorConsoleEvent(SIPMonitorServerTypesEnum.UserAgentClient, SIPMonitorEventTypesEnum.DialPlan, "Server response " + sipResponse.StatusCode + " " + reasonPhrase + " received for " + sipTransaction.TransactionRequest.Method +" to " + m_callDescriptor.Uri + ".", m_owner));
if (sipResponse.Status == SIPResponseStatusCodesEnum.ProxyAuthenticationRequired || sipResponse.Status == SIPResponseStatusCodesEnum.Unauthorised)
{
if (sipResponse.Header.AuthenticationHeader != null)
{
if ((m_callDescriptor.Username != null || m_callDescriptor.AuthUsername != null) && m_callDescriptor.Password != null)
{
SIPRequest authenticatedRequest = GetAuthenticatedRequest(sipTransaction.TransactionRequest, sipResponse);
SIPNonInviteTransaction authTransaction = m_sipTransport.CreateNonInviteTransaction(authenticatedRequest, sipTransaction.RemoteEndPoint, localSIPEndPoint, m_outboundProxy);
authTransaction.NonInviteTransactionFinalResponseReceived += AuthResponseReceived;
authTransaction.NonInviteTransactionTimedOut += RequestTimedOut;
m_sipTransport.SendSIPReliable(authTransaction);
}
else
{
Log_External(new SIPMonitorConsoleEvent(SIPMonitorServerTypesEnum.UserAgentClient, SIPMonitorEventTypesEnum.DialPlan, "Send request received an authentication required response but no credentials were available.", m_owner));
if (ResponseReceived != null)
{
ResponseReceived(sipResponse);
}
}
}
else
{
Log_External(new SIPMonitorConsoleEvent(SIPMonitorServerTypesEnum.UserAgentClient, SIPMonitorEventTypesEnum.DialPlan, "Send request failed with " + sipResponse.StatusCode + " but no authentication header was supplied for " + sipTransaction.TransactionRequest.Method + " to " + m_callDescriptor.Uri + ".", m_owner));
if (ResponseReceived != null)
{
ResponseReceived(sipResponse);
}
}
}
else
{
if (ResponseReceived != null)
{
ResponseReceived(sipResponse);
}
}
}
catch (Exception excp)
{
logger.Error("Exception SIPNonInviteClientUserAgent ServerResponseReceived (" + remoteEndPoint + "). " + excp.Message);
}
}
private void LogSIPResponseOut(SIPEndPoint localSIPEndPoint, SIPEndPoint endPoint, SIPResponse sipResponse)
{
string message = "App Svr Sent: " + localSIPEndPoint.ToString() + "->" + endPoint.ToString() + "\r\n" + sipResponse.ToString();
//logger.Debug("as: response out " + sipResponse.Header.CSeqMethod + " " + localSIPEndPoint.ToString() + "->" + endPoint.ToString() + ", callid=" + sipResponse.Header.CallId + ".");
string fromUser = (sipResponse.Header.From != null && sipResponse.Header.From.FromURI != null) ? sipResponse.Header.From.FromURI.User : "******";
FireSIPMonitorEvent(new SIPMonitorConsoleEvent(SIPMonitorServerTypesEnum.AppServer, SIPMonitorEventTypesEnum.FullSIPTrace, message, fromUser, localSIPEndPoint, endPoint));
}
/// <summary>
/// The event handler for responses to the authenticated register request.
/// </summary>
private void AuthResponseReceived(SIPEndPoint localSIPEndPoint, SIPEndPoint remoteEndPoint, SIPTransaction sipTransaction, SIPResponse sipResponse)
{
try
{
Log_External(new SIPMonitorConsoleEvent(SIPMonitorServerTypesEnum.UserAgentClient, SIPMonitorEventTypesEnum.ContactRegisterInProgress, "Server auth response " + sipResponse.Status + " received for " + m_sipAccountAOR.ToString() + ".", m_owner));
if (sipResponse.Status == SIPResponseStatusCodesEnum.Ok)
{
if (m_expiry > 0)
{
ServiceRoute = sipResponse.Header.ServiceRoute;
m_isRegistered = true;
m_expiry = GetUpdatedExpiry(sipResponse);
//if (sipResponse.Header.SwitchboardToken != null && m_lastServerNonce != null)
//{
// SwitchboardToken = Crypto.SymmetricDecrypt(m_password, m_lastServerNonce, sipResponse.Header.SwitchboardToken);
//}
if (RegistrationSuccessful != null)
{
RegistrationSuccessful(m_sipAccountAOR);
}
}
else
{
m_isRegistered = false;
if (RegistrationRemoved != null)
{
RegistrationRemoved(m_sipAccountAOR);
}
}
m_waitForRegistrationMRE.Set();
}
else if (sipResponse.Status == SIPResponseStatusCodesEnum.IntervalTooBrief && m_expiry != 0)
{
m_expiry = GetUpdatedExpiryForIntervalTooBrief(sipResponse);
Log_External(new SIPMonitorConsoleEvent(SIPMonitorServerTypesEnum.UserAgentClient, SIPMonitorEventTypesEnum.ContactRegisterInProgress, "Registration for " + m_sipAccountAOR.ToString() + " had a too short expiry, updated to +" + m_expiry + " and trying again.", m_owner));
SendInitialRegister();
}
else if (sipResponse.Status == SIPResponseStatusCodesEnum.Forbidden || sipResponse.Status == SIPResponseStatusCodesEnum.NotFound || sipResponse.Status == SIPResponseStatusCodesEnum.PaymentRequired)
{
// SIP account does not appear to exist.
Log_External(new SIPMonitorConsoleEvent(SIPMonitorServerTypesEnum.UserAgentClient, SIPMonitorEventTypesEnum.ContactRegisterFailed, "Registration failed with " + sipResponse.Status + " for " + m_sipAccountAOR.ToString() + ", no further registration attempts will be made.", m_owner));
string reasonPhrase = (sipResponse.ReasonPhrase.IsNullOrBlank()) ? sipResponse.Status.ToString() : sipResponse.ReasonPhrase;
if (RegistrationFailed != null)
{
RegistrationFailed(m_sipAccountAOR, "Registration failed with " + (int)sipResponse.Status + " " + reasonPhrase + ".");
}
m_exit = true;
m_waitForRegistrationMRE.Set();
}
else if (sipResponse.Status == SIPResponseStatusCodesEnum.ProxyAuthenticationRequired || sipResponse.Status == SIPResponseStatusCodesEnum.Unauthorised)
{
// SIP account credentials failed.
Log_External(new SIPMonitorConsoleEvent(SIPMonitorServerTypesEnum.UserAgentClient, SIPMonitorEventTypesEnum.ContactRegisterFailed, "Registration failed with " + sipResponse.Status + " for " + m_sipAccountAOR.ToString() + ", no further registration attempts will be made.", m_owner));
string reasonPhrase = (sipResponse.ReasonPhrase.IsNullOrBlank()) ? sipResponse.Status.ToString() : sipResponse.ReasonPhrase;
if (RegistrationFailed != null)
{
RegistrationFailed(m_sipAccountAOR, "Registration failed with " + (int)sipResponse.Status + " " + reasonPhrase + ".");
}
m_exit = true;
m_waitForRegistrationMRE.Set();
}
else
{
Log_External(new SIPMonitorConsoleEvent(SIPMonitorServerTypesEnum.UserAgentClient, SIPMonitorEventTypesEnum.ContactRegisterFailed, "Registration failed with " + sipResponse.Status + " for " + m_sipAccountAOR.ToString() + ".", m_owner));
m_isRegistered = false;
if (RegistrationTemporaryFailure != null)
{
RegistrationTemporaryFailure(m_sipAccountAOR, "Registration failed with " + sipResponse.Status + ".");
}
m_waitForRegistrationMRE.Set();
}
}
catch (Exception excp)
{
logger.Error("Exception SIPRegistrationUserAgent AuthResponseReceived. " + excp.Message);
}
}
private void ProcessRedirect(ISIPClientUserAgent answeredUAC, SIPResponse answeredResponse)
{
try
{
SIPURI redirectURI = answeredResponse.Header.Contact[0].ContactURI;
if (redirectURI == null)
{
FireProxyLogEvent(new SIPMonitorConsoleEvent(SIPMonitorServerTypesEnum.AppServer, SIPMonitorEventTypesEnum.DialPlan, "Redirect target could not be determined from redirect response, ignoring.", m_username));
}
else
{
//string canincalDomain = m_dialPlanContext.GetCanonicalDomain_External(redirectURI.Host, false);
if (answeredUAC.CallDescriptor.RedirectMode == SIPCallRedirectModesEnum.NewDialPlan)
{
m_dialPlanContext.ExecuteDialPlanForRedirect(answeredResponse);
}
else if (answeredUAC.CallDescriptor.RedirectMode == SIPCallRedirectModesEnum.Manual)
{
FireProxyLogEvent(new SIPMonitorConsoleEvent(SIPMonitorServerTypesEnum.AppServer, SIPMonitorEventTypesEnum.DialPlan, "Redirect response with URI " + redirectURI.ToString() + " was not acted on as redirect mode set to manual in dial string.", m_username));
CallLegCompleted();
}
else
{
// The redirect was not explicitly allowed so will be processed as an anonymous call.
FireProxyLogEvent(new SIPMonitorConsoleEvent(SIPMonitorServerTypesEnum.AppServer, SIPMonitorEventTypesEnum.DialPlan, "Redirect response to " + redirectURI.ToString() + " accepted.", m_username));
var redirectCalls = m_dialStringParser.GetForwardsForRedirect(redirectURI, answeredUAC.CallDescriptor);
//SIPCallDescriptor redirectCallDescriptor = answeredUAC.CallDescriptor.CopyOf();
//redirectCallDescriptor.Uri = redirectURI.ToString();
//StartNewCallAsync(redirectCallDescriptor);
if (redirectCalls != null && redirectCalls.Count > 0)
{
foreach (var redirectCall in redirectCalls)
{
StartNewCallAsync(redirectCall);
}
}
}
//else if (answeredUAC.CallDescriptor.RedirectMode == SIPCallRedirectModesEnum.Replace)
//{
// // In the Replace redirect mode the existing dialplan execution needs to be cancelled and the single redirect call be used to replace it.
// FireProxyLogEvent(new SIPMonitorConsoleEvent(SIPMonitorServerTypesEnum.AppServer, SIPMonitorEventTypesEnum.DialPlan, "Redirect response rejected as Replace mode not yet implemented.", m_username));
// CallLegCompleted();
//}
//else
//{
// FireProxyLogEvent(new SIPMonitorConsoleEvent(SIPMonitorServerTypesEnum.AppServer, SIPMonitorEventTypesEnum.DialPlan, "Redirect response with URI " + redirectURI.ToString() + " was not acted on as not enabled in dial string.", m_username));
// CallLegCompleted();
//}
// A redirect response was received. Create a new call leg(s) using the SIP URIs in the contact header of the response.
//if (m_dialStringParser != null)
//{
// // If there is a dial string parser available it will be used to generate a list of call destination from the redirect URI.
// SIPCallDescriptor redirectCallDescriptor = answeredUAC.CallDescriptor.CopyOf();
// Queue<List<SIPCallDescriptor>> redirectQueue = m_dialStringParser.ParseDialString(DialPlanContextsEnum.Script, null, redirectURI.ToString(), redirectCallDescriptor.CustomHeaders,
// redirectCallDescriptor.ContentType, redirectCallDescriptor.Content, null, redirectCallDescriptor.FromDisplayName, redirectCallDescriptor.FromURIUsername, redirectCallDescriptor.FromURIHost, null, CustomerServiceLevels.None);
// if (redirectQueue != null && redirectQueue.Count > 0)
// {
// // Only the first list in the queue is used (and there should only be a single list since it's generated from a redirect SIP URI and not
// // a full dial string).
// List<SIPCallDescriptor> callDescriptors = redirectQueue.Dequeue();
// for (int index = 0; index < callDescriptors.Count; index++)
// {
// callDescriptors[index].MangleIPAddress = redirectCallDescriptor.MangleIPAddress;
// callDescriptors[index].MangleResponseSDP = redirectCallDescriptor.MangleResponseSDP;
// callDescriptors[index].TransferMode = redirectCallDescriptor.TransferMode;
// }
// Start(callDescriptors);
// }
// else
// {
// FireProxyLogEvent(new SIPMonitorConsoleEvent(SIPMonitorServerTypesEnum.AppServer, SIPMonitorEventTypesEnum.DialPlan, "A redirect response to " + redirectURI.ToString() + " did not generate any new call leg destinations.", m_username));
// }
//}
//else
//{
// FireProxyLogEvent(new SIPMonitorConsoleEvent(SIPMonitorServerTypesEnum.AppServer, SIPMonitorEventTypesEnum.DialPlan, "Redirect response to " + redirectURI.ToString() + " accepted.", m_username));
// SIPCallDescriptor redirectCallDescriptor = answeredUAC.CallDescriptor.CopyOf();
// redirectCallDescriptor.Uri = redirectURI.ToString();
// StartNewCallAsync(redirectCallDescriptor);
//}
}
}
catch (Exception excp)
{
logger.Error("Exception ForkCall ProcessRedirect. " + excp.Message);
}
}
private SIPRequest GetAuthenticatedRegistrationRequest(SIPRequest registerRequest, SIPResponse sipResponse)
{
try
{
SIPAuthorisationDigest authRequest = sipResponse.Header.AuthenticationHeader.SIPDigest;
m_lastServerNonce = authRequest.Nonce;
string username = (m_authUsername != null) ? m_authUsername : m_sipAccountAOR.User;
authRequest.SetCredentials(username, m_password, registerRequest.URI.ToString(), SIPMethodsEnum.REGISTER.ToString());
SIPRequest regRequest = registerRequest.Copy();
regRequest.LocalSIPEndPoint = registerRequest.LocalSIPEndPoint;
regRequest.Header.Vias.TopViaHeader.Branch = CallProperties.CreateBranchId();
regRequest.Header.From.FromTag = CallProperties.CreateNewTag();
regRequest.Header.To.ToTag = null;
regRequest.Header.CSeq = ++m_cseq;
regRequest.Header.AuthenticationHeader = new SIPAuthenticationHeader(authRequest);
regRequest.Header.AuthenticationHeader.SIPDigest.Response = authRequest.Digest;
//if (RequestSwitchboardToken)
//{
// regRequest.Header.SwitchboardTokenRequest = m_expiry;
//}
return regRequest;
}
catch (Exception excp)
{
logger.Error("Exception GetAuthenticatedRegistrationRequest. " + excp.Message);
throw excp;
}
}
private void UACCallProgress(ISIPClientUserAgent uac, SIPResponse progressResponse)
{
try
{
if (m_commandCancelled)
{
//logger.Debug("Call " + uac.CallDescriptor.Uri + " should not be in a progress state after a cancel. Cancel again.");
uac.Cancel();
}
else
{
CallProgress(progressResponse.Status, progressResponse.ReasonPhrase, null, progressResponse.Header.ContentType, progressResponse.Body, uac);
}
}
catch (Exception excp)
{
logger.Error("Exception ForkCall UACCallProgress. " + excp);
}
}
private async Task <SocketError> UACInviteTransaction_TransactionInformationResponseReceived(SIPEndPoint localSIPEndPoint, SIPEndPoint remoteEndPoint, SIPTransaction sipTransaction, SIPResponse sipResponse)
{
try
{
if (sipResponse.StatusCode > 100 && sipResponse.StatusCode <= 199)
{
if (sipResponse.Header.RSeq > 0)
{
// Send a PRACK for this provisional response.
m_cseq++;
PRackRequest = GetAcknowledgeRequest(sipResponse, SIPMethodsEnum.PRACK, m_cseq, null, null);
await SendRequestAsync(PRackRequest).ConfigureAwait(false);
}
}
if (CDR != null)
{
SIPEndPoint localEP = SIPEndPoint.TryParse(sipResponse.Header.ProxyReceivedOn) ?? localSIPEndPoint;
SIPEndPoint remoteEP = SIPEndPoint.TryParse(sipResponse.Header.ProxyReceivedFrom) ?? remoteEndPoint;
CDR.Progress(sipResponse.Status, sipResponse.ReasonPhrase, localEP, remoteEP);
}
if (UACInviteTransactionInformationResponseReceived != null)
{
return(await UACInviteTransactionInformationResponseReceived(localSIPEndPoint, remoteEndPoint, sipTransaction, sipResponse).ConfigureAwait(false));
}
else
{
return(SocketError.Success);
}
}
catch (Exception excp)
{
logger.LogError("Exception UACInviteTransaction_TransactionInformationResponseReceived. " + excp.Message);
return(SocketError.Fault);
}
}
