public bool stopAccounting(string username, Packet.Acct_Terminate_CauseType? terminateCause)
{
Packet accountingRequest = new Packet(Packet.Code.Accounting_Request, identifier, sharedKey);
accountingRequest.addAttribute(Packet.AttributeType.User_Name, username);
if(String.IsNullOrEmpty(sessionId))
throw new RADIUSException("Session ID must be present for accounting.");
accountingRequest.addAttribute(Packet.AttributeType.Acct_Session_Id, sessionId);
accountingRequest.addAttribute(Packet.AttributeType.Acct_Status_Type, (int)Packet.Acct_Status_TypeType.Stop);
if(terminateCause != null)
accountingRequest.addAttribute(Packet.AttributeType.Acct_Terminate_Cause, (int) Packet.Acct_Terminate_CauseType.User_Request);
//Accounting request packet created, sending data...
UdpClient client = new UdpClient(server, accountingPort);
client.Client.SendTimeout = timeout;
client.Client.ReceiveTimeout = timeout;
m_logger.DebugFormat("Attempting to send {0} for user {1}", accountingRequest.code, username);
int retryCt = 0;
while (true)
{
try
{
client.Send(accountingRequest.toBytes(), accountingRequest.length);
//Listen for response, since the server has been specified, we don't need to re-specify server
IPEndPoint RemoteIpEndPoint = new IPEndPoint(IPAddress.Any, 0);
byte[] respBytes = client.Receive(ref RemoteIpEndPoint);
Packet responsePacket = new Packet(respBytes);
//Verify packet response is good, authenticator should be MD5(Code+ID+Length+RequestAuth+Attributes+Secret)
if (!responsePacket.verifyResponseAuthenticator(accountingRequest.authenticator, sharedKey))
throw new RADIUSException(String.Format("Received response to accounting request with code: {0}, but an incorrect response authenticator was supplied.", responsePacket.code));
lastReceievedPacket = responsePacket;
client.Close();
m_logger.DebugFormat("Received accounting response: {0} for user {1}", responsePacket.code, username);
return responsePacket.code == Packet.Code.Accounting_Response;
//SocketException is thrown if the server does not respond by end of timeout
}
catch (SocketException se)
{
m_logger.DebugFormat("Accounting stop attempt {0}/{1} failed. Reason: {2}", retryCt + 1, maxRetries, se.Message);
retryCt++;
if (retryCt >= maxRetries)
throw new RADIUSException(String.Format("No response from server after {0} tries.", maxRetries), se);
}
catch (Exception e)
{
throw new RADIUSException("Unexpected error while trying stop accounting.", e);
}
}
}
public bool interimUpdate(string username)
{
Packet p = new Packet(Packet.Code.Accounting_Request, this.identifier, this.sharedKey);
p.addAttribute(Packet.AttributeType.User_Name, username);
if (String.IsNullOrEmpty(sessionId))
throw new RADIUSException("Session ID must be present for accounting.");
p.addAttribute(Packet.AttributeType.Acct_Session_Id, sessionId);
p.addAttribute(Packet.AttributeType.Acct_Status_Type, (int)Packet.Acct_Status_Type.Interim_Update);
p.addAttribute(Packet.AttributeType.Acct_Session_Time, (int)(DateTime.Now - accountingStartTime).TotalSeconds);
if (NAS_IP_Address != null)
p.addAttribute(Packet.AttributeType.NAS_IP_Address, NAS_IP_Address);
if (!String.IsNullOrEmpty(NAS_Identifier))
p.addAttribute(Packet.AttributeType.NAS_Identifier, NAS_Identifier);
if (!String.IsNullOrEmpty(called_station_id))
p.addAttribute(Packet.AttributeType.Called_Station_Id, called_station_id);
m_logger.DebugFormat("Attempting to send interim-update for user {0}", username);
for (int retryCt = 0; retryCt <= maxRetries; retryCt++)
{
foreach (string server in servers)
{
//Accounting request packet created, sending data...
UdpClient client = new UdpClient(server, accountingPort);
client.Client.SendTimeout = timeout;
client.Client.ReceiveTimeout = timeout;
try
{
client.Send(p.toBytes(), p.length);
//Listen for response, since the server has been specified, we don't need to re-specify server
IPEndPoint RemoteIpEndPoint = new IPEndPoint(IPAddress.Any, 0);
byte[] respBytes = client.Receive(ref RemoteIpEndPoint);
Packet responsePacket = new Packet(respBytes);
//Verify packet response is good, authenticator should be MD5(Code+ID+Length+RequestAuth+Attributes+Secret)
if (!responsePacket.verifyResponseAuthenticator(p.authenticator, sharedKey))
throw new RADIUSException(String.Format("Received response to interim-update with code: {0}, but an incorrect response authenticator was supplied.", responsePacket.code));
lastReceievedPacket = responsePacket;
client.Close();
m_logger.DebugFormat("Received interim-update response: {0} for user {1}", responsePacket.code, username);
return responsePacket.code == Packet.Code.Accounting_Response;
//SocketException is thrown if the server does not respond by end of timeout
}
catch (SocketException se)
{
m_logger.DebugFormat("Accounting interim-update attempt {0}/{1} using {2} failed. Reason: {3}", retryCt + 1, maxRetries + 1, server, se.Message);
}
catch (Exception e)
{
throw new RADIUSException("Unexpected error while sending interim-update.", e);
}
}
}
throw new RADIUSException(String.Format("No response from server(s) after {0} tries.", maxRetries + 1));
}
//Connects to the RADIUS server and attempts to authenticate the specified user info
//Sets username value and authenticated members IFF successful
public bool Authenticate(string username, string password)
{
UdpClient client = new UdpClient(server, authenticationPort);
client.Client.SendTimeout = timeout;
client.Client.ReceiveTimeout = timeout;
Packet authPacket = new Packet(Packet.Code.Access_Request, identifier, sharedKey);
authPacket.sharedKey = sharedKey;
authPacket.addAttribute(Packet.AttributeType.User_Name, username);
authPacket.addAttribute(Packet.AttributeType.User_Password, password);
if(!String.IsNullOrEmpty(sessionId))
authPacket.addAttribute(Packet.AttributeType.Acct_Session_Id, sessionId);
if (NAS_Identifier == null && NAS_IP_Address == null)
throw new RADIUSException("A NAS_Identifier or NAS_IP_Address (or both) must be supplied.");
if(NAS_IP_Address != null)
authPacket.addRawAttribute(Packet.AttributeType.NAS_IP_Address, NAS_IP_Address);
if (NAS_Identifier != null)
authPacket.addAttribute(Packet.AttributeType.NAS_Identifier, NAS_Identifier);
m_logger.DebugFormat("Attempting to send {0} for user {1}", authPacket.code, username);
int retryCt = 0;
while (true)
{
try
{
client.Send(authPacket.toBytes(), authPacket.length);
//Listen for response, since the server has been specified, we don't need to re-specify server
IPEndPoint RemoteIpEndPoint = new IPEndPoint(IPAddress.Any, 0);
byte[] respBytes = client.Receive(ref RemoteIpEndPoint);
Packet responsePacket = new Packet(respBytes);
//Verify packet authenticator is correct
if (!responsePacket.verifyResponseAuthenticator(authPacket.authenticator, sharedKey))
throw new RADIUSException(String.Format("Received response to authentication with code: {0}, but an incorrect response authenticator was supplied.", responsePacket.code));
lastReceievedPacket = responsePacket;
client.Close();
m_logger.DebugFormat("Received authentication response: {0} for user {1}", responsePacket.code, username);
if (responsePacket.code == Packet.Code.Access_Accept)
{
this.authenticated = true;
return true;
}
else
return false;
}
//SocketException is thrown if the server does not respond by end of timeout
catch (SocketException se)
{
m_logger.DebugFormat("Authentication attempt {0}/{1} failed. Reason: {2}", retryCt+1, maxRetries, se.Message);
retryCt++;
if (retryCt >= maxRetries)
throw new RADIUSException(String.Format("No response from server after {0} tries.", maxRetries), se);
}
catch (Exception e)
{
throw new RADIUSException("Unexpected error while trying to authenticate.", e);
}
}
}
//Sends a start accounting request to the RADIUS server, returns true on acknowledge of request
public bool startAccounting(string username, Packet.Acct_Authentic authType)
{
//Create accounting request packet
Packet accountingRequest = new Packet(Packet.Code.Accounting_Request, identifier, sharedKey);
accountingRequest.addAttribute(Packet.AttributeType.User_Name, username);
accountingRequest.addAttribute(Packet.AttributeType.Acct_Status_Type, (int)Packet.Acct_Status_Type.Start);
if (String.IsNullOrEmpty(sessionId)) //Create new guid
sessionId = Guid.NewGuid().ToString();
accountingRequest.addAttribute(Packet.AttributeType.Acct_Session_Id, sessionId);
if (String.IsNullOrEmpty(NAS_Identifier) && NAS_IP_Address == null)
throw new RADIUSException("A NAS_Identifier or NAS_IP_Address (or both) must be supplied.");
if (NAS_IP_Address != null)
accountingRequest.addAttribute(Packet.AttributeType.NAS_IP_Address, NAS_IP_Address);
if (!String.IsNullOrEmpty(NAS_Identifier))
accountingRequest.addAttribute(Packet.AttributeType.NAS_Identifier, NAS_Identifier);
if (!String.IsNullOrEmpty(called_station_id))
accountingRequest.addAttribute(Packet.AttributeType.Called_Station_Id, called_station_id);
if (authType != Packet.Acct_Authentic.Not_Specified)
accountingRequest.addAttribute(Packet.AttributeType.Acct_Authentic, (int)authType);
//m_logger.DebugFormat("Attempting to send {0} for user {1}", accountingRequest.code, username);
for (int retryCt = 0; retryCt <= maxRetries; retryCt++)
{
foreach (string server in servers)
{
//Accounting request packet created, sending data...
UdpClient client = new UdpClient(server, accountingPort);
client.Client.SendTimeout = timeout;
client.Client.ReceiveTimeout = timeout;
try
{
client.Send(accountingRequest.toBytes(), accountingRequest.length);
//Listen for response, since the server has been specified, we don't need to re-specify server
IPEndPoint RemoteIpEndPoint = new IPEndPoint(IPAddress.Any, 0);
byte[] respBytes = client.Receive(ref RemoteIpEndPoint);
Packet responsePacket = new Packet(respBytes);
//Verify packet response is good, authenticator should be MD5(Code+ID+Length+RequestAuth+Attributes+Secret)
if (!responsePacket.verifyResponseAuthenticator(accountingRequest.authenticator, sharedKey))
throw new RADIUSException(String.Format("Received response to accounting request with code: {0}, but an incorrect response authenticator was supplied.", responsePacket.code));
lastReceievedPacket = responsePacket;
client.Close();
m_logger.DebugFormat("Received accounting response: {0} for user {1}", responsePacket.code, username);
if (responsePacket.code == Packet.Code.Accounting_Response)
accountingStartTime = DateTime.Now;
return responsePacket.code == Packet.Code.Accounting_Response;
}
//SocketException is thrown if the server does not respond by end of timeout
catch (SocketException se)
{
m_logger.DebugFormat("Accounting start attempt {0}/{1} using {2} failed. Reason: {3}", retryCt + 1, maxRetries + 1, server, se.Message);
}
catch (Exception e)
{
throw new RADIUSException("Unexpected error while trying start accounting.", e);
}
}
}
throw new RADIUSException(String.Format("No response from server(s) after {0} tries.", maxRetries + 1));
}