private void SIPCancelTransaction_TransactionRequestReceived(SIPEndPoint localSIPEndPoint, SIPEndPoint remoteEndPoint, SIPTransaction sipTransaction, SIPRequest sipRequest) { try { //logger.Debug("CANCEL request received, attempting to locate and cancel transaction."); //UASInviteTransaction originalTransaction = (UASInviteTransaction)GetTransaction(GetRequestTransactionId(sipRequest.Header.Via.TopViaHeader.Branch, SIPMethodsEnum.INVITE)); SIPResponse cancelResponse; if (m_originalTransaction != null) { //logger.Debug("Transaction found to cancel " + originalTransaction.TransactionId + " type " + originalTransaction.TransactionType + "."); m_originalTransaction.CancelCall(); cancelResponse = GetCancelResponse(sipRequest, SIPResponseStatusCodesEnum.Ok); } else { cancelResponse = GetCancelResponse(sipRequest, SIPResponseStatusCodesEnum.CallLegTransactionDoesNotExist); } //UpdateTransactionState(SIPTransactionStatesEnum.Completed); SendFinalResponse(cancelResponse); } catch (Exception excp) { logger.Error("Exception SIPCancelTransaction GotRequest. " + excp.Message); } }