public void ProcessExtensionAuthentication(PreprocessSipRequestEventArgs e)
{
try
{
SIPURI fromURI = new SIPURI(e.Request.HeaderFields["From", "f"].FieldValue);
// Is this coming from an internal extension
WOSI.CallButler.Data.CallButlerDataset.ExtensionsRow extension = dataProvider.GetExtensionNumber(Properties.Settings.Default.CustomerID, Convert.ToInt32(fromURI.User));
if (extension != null)
{
if (ProcessRequestAuthorization(e, fromURI, false))
{
e.Handled = false;
}
else
{
e.Handled = true;
}
}
}
catch
{
}
}
private bool ProcessRequestAuthorization(PreprocessSipRequestEventArgs e, SIPURI fromURI, bool requireRegistration)
{
try
{
switch (e.Request.SIPMethodType)
{
case SIPMethodType.INVITE:
case SIPMethodType.REGISTER:
//if (Properties.Settings.Default.SIPRegistrarDomain == null || Properties.Settings.Default.SIPRegistrarDomain.Length == 0 || fromURI.Host == ipClient.LocalIPAddress /*|| fromURI.Host == ipClient.Sip*/ || string.Compare(fromURI.Host, Properties.Settings.Default.SIPRegistrarDomain, true) == 0)
//{
int extensionNumber = Convert.ToInt32(fromURI.User);
// Check to see if this is a valid extension
WOSI.CallButler.Data.CallButlerDataset.ExtensionsRow extension = dataProvider.GetExtensionNumber(Properties.Settings.Default.CustomerID, extensionNumber);
if (extension == null)
{
ipClient.SendSipResponse(e.Request.CreateResponse(404, "Not Found"));
return false;
}
// Get our PBX password from our database
string pbxPassword = "";
if (extension.PBXPassword.Length > 0)
pbxPassword = WOSI.Utilities.CryptoUtils.Decrypt(extension.PBXPassword, WOSI.CallButler.Data.Constants.EncryptionPassword);
if (requireRegistration && !PresenceInfoExists(extensionNumber, e.Request.SentFrom, e.Request.SentFromPort, true))
{
// If we require registration and the SIP client isn't registered, return a 404 not found
ipClient.SendSipResponse(e.Request.CreateResponse(404, "Not Found"));
return false;
}
else if (IsRequestAuthorized(e.Request, extensionNumber.ToString(), pbxPassword))
{
return true;
}
else
{
string realmDomain = Properties.Settings.Default.SIPRegistrarDomain;
if (realmDomain == null || realmDomain.Length == 0)
realmDomain = ipClient.LocalIPAddress;
// Tell the client that we need authorization
string authString = string.Format("Digest realm=\"{0}\", domain=\"sip:{1}\", nonce=\"{2}\", algorithm=MD5", realmDomain, realmDomain, Guid.NewGuid().ToString());
SipResponse response = e.Request.CreateResponse(401, "Unauthorized");
response.HeaderFields.InsertAfter("CSeq", "WWW-Authenticate", authString);
ipClient.SendSipResponse(response);
return false;
}
/*}
else
{
ipClient.SendSipResponse(e.Request.CreateResponse(404, "Not Found"));
return false;
}*/
break;
default:
return true;
}
}
catch
{
}
return false;
}
void ProcessRegister(PreprocessSipRequestEventArgs e)
{
e.Handled = true;
bool isNewRegistration = false;
// Remove the Record-Route field as per RFC-3261 10.3
if (e.Request.HeaderFields.Contains("Record-Route", null))
e.Request.HeaderFields.Remove("Record-Route");
try
{
SIPURI addressOfRecord = new SIPURI(e.Request.HeaderFields["To", "t"].FieldValue);
// Make sure the request is authorized
if (ProcessRequestAuthorization(e, addressOfRecord, false))
{
int extensionNumber = 0;
try
{
extensionNumber = Convert.ToInt32(addressOfRecord.User);
}
catch
{
ipClient.SendSipResponse(e.Request.CreateResponse(404, "Not Found"));
return;
}
PBXPresenceInfo presenceInfo = FindPresenceInfo(extensionNumber, e.Request.SentFrom, e.Request.SentFromPort, true);
if (e.Request.HeaderFields.Contains("Contact", "m"))
{
HeaderField[] contactFields = e.Request.HeaderFields.GetMultiHeaderFields("Contact", "m");
bool containsStar = false;
foreach (HeaderField contactField in contactFields)
{
if (contactField.FieldValue == "*")
{
containsStar = true;
}
}
if (containsStar)
{
if (contactFields.Length > 1 || !e.Request.HeaderFields.Contains("Expires", null) || e.Request.HeaderFields["Expires", null].FieldValue.Trim() != "0")
{
ipClient.SendSipResponse(e.Request.CreateResponse(400, "Invalid Request"));
return;
}
}
int requestedExpiration = 0;
if (contactFields[0].ContainsParameter("Expires"))
requestedExpiration = Convert.ToInt32(contactFields[0].Parameters["Expires"]);
else if (e.Request.HeaderFields.Contains("Expires", null))
requestedExpiration = Convert.ToInt32(e.Request.HeaderFields["Expires", null].FieldValue);
else
requestedExpiration = Properties.Settings.Default.PresenceTimeout;
if (presenceInfo != null)
{
// Check the Call-ID
string callID = e.Request.HeaderFields["Call-ID", "i"].FieldValue;
if (callID == presenceInfo.SessionID)
{
// Parse our CSeq
int cSeq = Convert.ToInt32(e.Request.HeaderFields["CSeq", null].FieldValue.Split(' ')[0]);
if (cSeq < presenceInfo.CSeq)
{
RemovePresenceInfo(presenceInfo);
ipClient.SendSipResponse(e.Request.CreateResponse(400, "Invalid Request"));
return;
}
}
if (requestedExpiration == 0)
{
RemovePresenceInfo(presenceInfo);
ipClient.SendSipResponse(e.Request.CreateResponse(200, "OK"));
return;
}
}
else
{
presenceInfo = new PBXPresenceInfo();
isNewRegistration = true;
}
presenceInfo.AddressOfRecord = new SIPURI(e.Request.HeaderFields["To", "t"].FieldValue).BasicURIStringWithoutParameters;
presenceInfo.CSeq = Convert.ToInt32(e.Request.HeaderFields["CSeq", null].FieldValue.Split(' ')[0]);
presenceInfo.ExpiresInSeconds = requestedExpiration;
presenceInfo.ExtensionNumber = extensionNumber;
presenceInfo.LastRegistration = DateTime.Now;
presenceInfo.Name = addressOfRecord.DisplayName;
presenceInfo.RemoteAddress = e.Request.SentFrom;
presenceInfo.RemotePort = e.Request.SentFromPort;
presenceInfo.SessionID = e.Request.HeaderFields["Call-ID", "i"].FieldValue;
presenceInfo.Status = PBXPresenceStatus.Online;
if (isNewRegistration)
{
lock (presenceDataLock)
{
presenceData.Add(presenceInfo);
LoggingService.AddLogEntry(WOSI.CallButler.ManagementInterface.LogLevel.Extended, "Extension " + presenceInfo.ExtensionNumber + " registered for " + presenceInfo.RemoteAddress, false);
UpdateExtensionState(presenceInfo);
}
}
}
if (presenceInfo != null)
{
SipResponse response = e.Request.CreateResponse(200, "OK");
response.HeaderFields.InsertAfter("CSeq", e.Request.HeaderFields["Contact", "m"]);
response.HeaderFields["Contact", "m"].Parameters["expires"] = presenceInfo.ExpiresInSeconds.ToString();
response.HeaderFields.InsertAfter("Contact", "Date", DateTime.Now.ToUniversalTime().ToString("ddd, d MMM yyyy HH:mm:ss G\\MT"));
ipClient.SendSipResponse(response);
// Send our message waiting notification
if(isNewRegistration)
SendMessageWaitingNotification(extensionNumber);
PerformanceCounterService.PhonesRegistered = presenceData.Count;
}
else
{
ipClient.SendSipResponse(e.Request.CreateResponse(404, "Not Found"));
}
return;
}
}
catch (Exception ex)
{
ipClient.SendSipResponse(e.Request.CreateResponse(500, "Server Error"));
LoggingService.AddLogEntry(WOSI.CallButler.ManagementInterface.LogLevel.ErrorsOnly, Utils.ErrorUtils.FormatErrorString(ex), true);
}
}
public void ProcessExtensionAuthentication(PreprocessSipRequestEventArgs e)
{
try
{
SIPURI fromURI = new SIPURI(e.Request.HeaderFields["From", "f"].FieldValue);
// Is this coming from an internal extension
WOSI.CallButler.Data.CallButlerDataset.ExtensionsRow extension = dataProvider.GetExtensionNumber(Properties.Settings.Default.CustomerID, Convert.ToInt32(fromURI.User));
if (extension != null)
{
if (ProcessRequestAuthorization(e, fromURI, false))
e.Handled = false;
else
e.Handled = true;
}
}
catch
{
}
}
private bool ProcessRequestAuthorization(PreprocessSipRequestEventArgs e, SIPURI fromURI, bool requireRegistration)
{
try
{
switch (e.Request.SIPMethodType)
{
case SIPMethodType.INVITE:
case SIPMethodType.REGISTER:
//if (Properties.Settings.Default.SIPRegistrarDomain == null || Properties.Settings.Default.SIPRegistrarDomain.Length == 0 || fromURI.Host == ipClient.LocalIPAddress /*|| fromURI.Host == ipClient.Sip*/ || string.Compare(fromURI.Host, Properties.Settings.Default.SIPRegistrarDomain, true) == 0)
//{
int extensionNumber = Convert.ToInt32(fromURI.User);
// Check to see if this is a valid extension
WOSI.CallButler.Data.CallButlerDataset.ExtensionsRow extension = dataProvider.GetExtensionNumber(Properties.Settings.Default.CustomerID, extensionNumber);
if (extension == null)
{
ipClient.SendSipResponse(e.Request.CreateResponse(404, "Not Found"));
return(false);
}
// Get our PBX password from our database
string pbxPassword = "";
if (extension.PBXPassword.Length > 0)
{
pbxPassword = WOSI.Utilities.CryptoUtils.Decrypt(extension.PBXPassword, WOSI.CallButler.Data.Constants.EncryptionPassword);
}
if (requireRegistration && !PresenceInfoExists(extensionNumber, e.Request.SentFrom, e.Request.SentFromPort, true))
{
// If we require registration and the SIP client isn't registered, return a 404 not found
ipClient.SendSipResponse(e.Request.CreateResponse(404, "Not Found"));
return(false);
}
else if (IsRequestAuthorized(e.Request, extensionNumber.ToString(), pbxPassword))
{
return(true);
}
else
{
string realmDomain = Properties.Settings.Default.SIPRegistrarDomain;
if (realmDomain == null || realmDomain.Length == 0)
{
realmDomain = ipClient.LocalIPAddress;
}
// Tell the client that we need authorization
string authString = string.Format("Digest realm=\"{0}\", domain=\"sip:{1}\", nonce=\"{2}\", algorithm=MD5", realmDomain, realmDomain, Guid.NewGuid().ToString());
SipResponse response = e.Request.CreateResponse(401, "Unauthorized");
response.HeaderFields.InsertAfter("CSeq", "WWW-Authenticate", authString);
ipClient.SendSipResponse(response);
return(false);
}
/*}
* else
* {
* ipClient.SendSipResponse(e.Request.CreateResponse(404, "Not Found"));
* return false;
* }*/
break;
default:
return(true);
}
}
catch
{
}
return(false);
}
void ProcessRegister(PreprocessSipRequestEventArgs e)
{
e.Handled = true;
bool isNewRegistration = false;
// Remove the Record-Route field as per RFC-3261 10.3
if (e.Request.HeaderFields.Contains("Record-Route", null))
{
e.Request.HeaderFields.Remove("Record-Route");
}
try
{
SIPURI addressOfRecord = new SIPURI(e.Request.HeaderFields["To", "t"].FieldValue);
// Make sure the request is authorized
if (ProcessRequestAuthorization(e, addressOfRecord, false))
{
int extensionNumber = 0;
try
{
extensionNumber = Convert.ToInt32(addressOfRecord.User);
}
catch
{
ipClient.SendSipResponse(e.Request.CreateResponse(404, "Not Found"));
return;
}
PBXPresenceInfo presenceInfo = FindPresenceInfo(extensionNumber, e.Request.SentFrom, e.Request.SentFromPort, true);
if (e.Request.HeaderFields.Contains("Contact", "m"))
{
HeaderField[] contactFields = e.Request.HeaderFields.GetMultiHeaderFields("Contact", "m");
bool containsStar = false;
foreach (HeaderField contactField in contactFields)
{
if (contactField.FieldValue == "*")
{
containsStar = true;
}
}
if (containsStar)
{
if (contactFields.Length > 1 || !e.Request.HeaderFields.Contains("Expires", null) || e.Request.HeaderFields["Expires", null].FieldValue.Trim() != "0")
{
ipClient.SendSipResponse(e.Request.CreateResponse(400, "Invalid Request"));
return;
}
}
int requestedExpiration = 0;
if (contactFields[0].ContainsParameter("Expires"))
{
requestedExpiration = Convert.ToInt32(contactFields[0].Parameters["Expires"]);
}
else if (e.Request.HeaderFields.Contains("Expires", null))
{
requestedExpiration = Convert.ToInt32(e.Request.HeaderFields["Expires", null].FieldValue);
}
else
{
requestedExpiration = Properties.Settings.Default.PresenceTimeout;
}
if (presenceInfo != null)
{
// Check the Call-ID
string callID = e.Request.HeaderFields["Call-ID", "i"].FieldValue;
if (callID == presenceInfo.SessionID)
{
// Parse our CSeq
int cSeq = Convert.ToInt32(e.Request.HeaderFields["CSeq", null].FieldValue.Split(' ')[0]);
if (cSeq < presenceInfo.CSeq)
{
RemovePresenceInfo(presenceInfo);
ipClient.SendSipResponse(e.Request.CreateResponse(400, "Invalid Request"));
return;
}
}
if (requestedExpiration == 0)
{
RemovePresenceInfo(presenceInfo);
ipClient.SendSipResponse(e.Request.CreateResponse(200, "OK"));
return;
}
}
else
{
presenceInfo = new PBXPresenceInfo();
isNewRegistration = true;
}
presenceInfo.AddressOfRecord = new SIPURI(e.Request.HeaderFields["To", "t"].FieldValue).BasicURIStringWithoutParameters;
presenceInfo.CSeq = Convert.ToInt32(e.Request.HeaderFields["CSeq", null].FieldValue.Split(' ')[0]);
presenceInfo.ExpiresInSeconds = requestedExpiration;
presenceInfo.ExtensionNumber = extensionNumber;
presenceInfo.LastRegistration = DateTime.Now;
presenceInfo.Name = addressOfRecord.DisplayName;
presenceInfo.RemoteAddress = e.Request.SentFrom;
presenceInfo.RemotePort = e.Request.SentFromPort;
presenceInfo.SessionID = e.Request.HeaderFields["Call-ID", "i"].FieldValue;
presenceInfo.Status = PBXPresenceStatus.Online;
if (isNewRegistration)
{
lock (presenceDataLock)
{
presenceData.Add(presenceInfo);
LoggingService.AddLogEntry(WOSI.CallButler.ManagementInterface.LogLevel.Extended, "Extension " + presenceInfo.ExtensionNumber + " registered for " + presenceInfo.RemoteAddress, false);
UpdateExtensionState(presenceInfo);
}
}
}
if (presenceInfo != null)
{
SipResponse response = e.Request.CreateResponse(200, "OK");
response.HeaderFields.InsertAfter("CSeq", e.Request.HeaderFields["Contact", "m"]);
response.HeaderFields["Contact", "m"].Parameters["expires"] = presenceInfo.ExpiresInSeconds.ToString();
response.HeaderFields.InsertAfter("Contact", "Date", DateTime.Now.ToUniversalTime().ToString("ddd, d MMM yyyy HH:mm:ss G\\MT"));
ipClient.SendSipResponse(response);
// Send our message waiting notification
if (isNewRegistration)
{
SendMessageWaitingNotification(extensionNumber);
}
PerformanceCounterService.PhonesRegistered = presenceData.Count;
}
else
{
ipClient.SendSipResponse(e.Request.CreateResponse(404, "Not Found"));
}
return;
}
}
catch (Exception ex)
{
ipClient.SendSipResponse(e.Request.CreateResponse(500, "Server Error"));
LoggingService.AddLogEntry(WOSI.CallButler.ManagementInterface.LogLevel.ErrorsOnly, Utils.ErrorUtils.FormatErrorString(ex), true);
}
}
