/// <summary>
/// Does the real login, following the steps outlined below.<br/>
/// Connects to the asterisk server by calling connect() if not already connected<br/>
/// Waits until the protocol identifier is received. This is checked every sleepTime ms but not longer than timeout ms in total.<br/>
/// Sends a ChallengeAction requesting a challenge for authType MD5.<br/>
/// When the ChallengeResponse is received a LoginAction is sent using the calculated key (MD5 hash of the password appended to the received challenge).<br/>
/// </summary>
/// <param name="timeout">the maximum time to wait for the protocol identifier (in ms)</param>
/// <throws>
/// AuthenticationFailedException if username or password are incorrect and the login action returns an error or if the MD5
/// hash cannot be computed. The connection is closed in this case.
/// </throws>
/// <throws>
/// TimeoutException if a timeout occurs either while waiting for the
/// protocol identifier or when sending the challenge or login
/// action. The connection is closed in this case.
/// </throws>
private void login(int timeout)
{
enableEvents = false;
if (reconnected)
{
#if LOGGER
logger.Error("Login during reconnect state.");
#endif
throw new AuthenticationFailedException("Unable login during reconnect state.");
}
reconnectEnable = false;
DateTime start = DateTime.Now;
do
{
if (connect())
{
// Increase delay after connection up to 500 ms
Thread.Sleep(10 * sleepTime); // 200 milliseconds delay
}
try
{
Thread.Sleep(4 * sleepTime); // 200 milliseconds delay
}
catch
{ }
if (string.IsNullOrEmpty(protocolIdentifier) && timeout > 0 && Helper.GetMillisecondsFrom(start) > timeout)
{
disconnect(true);
throw new TimeoutException("Timeout waiting for protocol identifier");
}
} while (string.IsNullOrEmpty(protocolIdentifier));
ChallengeAction challengeAction = new ChallengeAction();
Response.ManagerResponse response = SendAction(challengeAction, defaultResponseTimeout * 2);
if (response is ChallengeResponse)
{
ChallengeResponse challengeResponse = (ChallengeResponse)response;
string key, challenge = challengeResponse.Challenge;
try
{
Util.MD5Support md = Util.MD5Support.GetInstance();
if (challenge != null)
md.Update(UTF8Encoding.UTF8.GetBytes(challenge));
if (password != null)
md.Update(UTF8Encoding.UTF8.GetBytes(password));
key = Helper.ToHexString(md.DigestData);
}
catch (Exception ex)
{
disconnect(true);
#if LOGGER
logger.Error("Unable to create login key using MD5 Message Digest.", ex);
#endif
throw new AuthenticationFailedException("Unable to create login key using MD5 Message Digest.", ex);
}
Action.LoginAction loginAction = new Action.LoginAction(username, "MD5", key);
Response.ManagerResponse loginResponse = SendAction(loginAction);
if (loginResponse is Response.ManagerError)
{
disconnect(true);
throw new AuthenticationFailedException(loginResponse.Message);
}
// successfully logged in so assure that we keep trying to reconnect when disconnected
reconnectEnable = keepAlive;
#if LOGGER
logger.Info("Successfully logged in");
#endif
asteriskVersion = determineVersion();
#if LOGGER
logger.Info("Determined Asterisk version: " + asteriskVersion);
#endif
enableEvents = true;
ConnectEvent ce = new ConnectEvent(this);
ce.ProtocolIdentifier = this.protocolIdentifier;
DispatchEvent(ce);
}
else if (response is ManagerError)
throw new ManagerException("Unable login to Asterisk - " + response.Message);
else
throw new ManagerException("Unknown response during login to Asterisk - " + response.GetType().Name + " with message " + response.Message);
}
internal void DispatchResponse(Dictionary<string, string> buffer, ManagerResponse response)
{
string responseActionId = string.Empty;
string actionId = string.Empty;
IResponseHandler responseHandler = null;
if (buffer != null)
{
if (buffer["response"].ToLower(Helper.CultureInfo) == "error")
response = new ManagerError(buffer);
else if (buffer.ContainsKey("actionid"))
actionId = buffer["actionid"];
}
if (response != null)
actionId = response.ActionId;
if (!string.IsNullOrEmpty(actionId))
{
int hash = Helper.GetInternalActionId(actionId).GetHashCode();
responseActionId = Helper.StripInternalActionId(actionId);
responseHandler = GetRemoveResponseHandler(hash);
if (response != null)
response.ActionId = responseActionId;
if (responseHandler != null)
{
if (response == null)
{
ManagerActionResponse action = responseHandler.Action as ManagerActionResponse;
if (action == null || (response = action.ActionCompleteResponseClass() as ManagerResponse) == null)
response = Helper.BuildResponse(buffer);
else
Helper.SetAttributes(response, buffer);
response.ActionId = responseActionId;
}
try
{
responseHandler.HandleResponse(response);
}
catch (Exception ex)
{
#if LOGGER
logger.Error("Unexpected exception in responseHandler {0}\n{1}", response, ex);
#else
throw new ManagerException("Unexpected exception in responseHandler " + responseHandler.GetType().FullName, ex);
#endif
}
}
}
if (response == null && buffer.ContainsKey("ping") && buffer["ping"] == "Pong")
{
response = Helper.BuildResponse(buffer);
foreach (ResponseHandler pingHandler in pingHandlers.Values)
pingHandler.HandleResponse(response);
pingHandlers.Clear();
}
if (!reconnected)
return;
if (response == null)
{
response = Helper.BuildResponse(buffer);
response.ActionId = responseActionId;
}
#if LOGGER
logger.Info("Reconnected - DispatchEvent : " + response);
#endif
#region Support background reconnect
if (response is ChallengeResponse)
{
string key = null;
if (response.IsSuccess())
{
ChallengeResponse challengeResponse = (ChallengeResponse)response;
string challenge = challengeResponse.Challenge;
try
{
Util.MD5Support md = Util.MD5Support.GetInstance();
if (challenge != null)
md.Update(UTF8Encoding.UTF8.GetBytes(challenge));
if (password != null)
md.Update(UTF8Encoding.UTF8.GetBytes(password));
key = Helper.ToHexString(md.DigestData);
}
#if LOGGER
catch (Exception ex)
{
logger.Error("Unable to create login key using MD5 Message Digest", ex);
#else
catch
{
#endif
key = null;
}
}
bool fail = true;
if (!string.IsNullOrEmpty(key))
try
{
Action.LoginAction loginAction = new Action.LoginAction(username, "MD5", key);
SendAction(loginAction, null);
fail = false;
}
catch { }
if (fail)
if (keepAliveAfterAuthenticationFailure)
reconnect(true);
else
disconnect(true);
}
else if (response is ManagerError)
{
if (keepAliveAfterAuthenticationFailure)
reconnect(true);
else
disconnect(true);
}
else if (response is ManagerResponse)
{
if (response.IsSuccess())
{
reconnected = false;
enableEvents = true;
reconnectEnable = keepAlive;
ConnectEvent ce = new ConnectEvent(this);
ce.Reconnect = true;
ce.ProtocolIdentifier = protocolIdentifier;
fireEvent(ce);
}
else if (keepAliveAfterAuthenticationFailure)
reconnect(true);
else
disconnect(true);
}
#endregion
}
/// <summary>
/// Reads line by line from the asterisk server, sets the protocol identifier as soon as it is
/// received and dispatches the received events and responses via the associated dispatcher.
/// </summary>
/// <seealso cref="ManagerConnection.DispatchEvent(ManagerEvent)" />
/// <seealso cref="ManagerConnection.DispatchResponse(Response.ManagerResponse)" />
/// <seealso cref="ManagerConnection.setProtocolIdentifier(String)" />
internal void Run()
{
if (mrSocket == null)
throw new SystemException("Unable to run: socket is null.");
string line;
while (true)
{
try
{
while (!die)
{
#region check line from *
if (!is_logoff)
{
if (mrSocket != null && mrSocket.Initial)
{
Reinitialize();
}
else if (disconnect)
{
disconnect = false;
mrConnector.DispatchEvent(new DisconnectEvent(mrConnector));
}
}
if (lineQueue.Count == 0)
{
if (lastPacketTime.AddMilliseconds(mrConnector.PingInterval) < DateTime.Now
&& mrConnector.PingInterval > 0
&& mrSocket != null
&& !wait4identiier
&& !is_logoff
)
{
if (pingHandler != null)
{
if (pingHandler.Response == null)
{
// If one PingInterval from Ping without Pong then send Disconnect event
mrConnector.RemoveResponseHandler(pingHandler);
mrConnector.DispatchEvent(new DisconnectEvent(mrConnector));
}
pingHandler.Free();
pingHandler = null;
}
else
{
// Send PING to *
try
{
pingHandler = new ResponseHandler(new Action.PingAction(), null);
mrConnector.SendAction(pingHandler.Action, pingHandler);
}
catch
{
disconnect = true;
mrSocket = null;
}
}
lastPacketTime = DateTime.Now;
}
Thread.Sleep(50);
if (mrConnector.TraceCallerThread && mrConnector.CallerThread != null && mrConnector.CallerThread.ThreadState == ThreadState.Stopped)
{
die = true;
break;
}
continue;
}
#endregion
lastPacketTime = DateTime.Now;
lock (((ICollection)lineQueue).SyncRoot)
line = lineQueue.Dequeue().Trim();
#if LOGGER
logger.Debug(line);
#endif
#region processing Response: Follows
if (processingCommandResult)
{
if (line == "--END COMMAND--")
{
Response.CommandResponse commandResponse = new Response.CommandResponse();
Helper.SetAttributes(commandResponse, packet);
commandResponse.Result = commandList;
processingCommandResult = false;
packet.Clear();
mrConnector.DispatchResponse(commandResponse);
continue;
}
else
{
string lineLower = line.ToLower(Helper.CultureInfo);
if (lineLower.StartsWith("privilege: ")
|| lineLower.StartsWith("actionid: ")
|| lineLower.StartsWith("timestamp: ")
|| lineLower.StartsWith("server: ")
)
Helper.AddKeyValue(packet, line);
else
commandList.Add(line);
}
continue;
}
#endregion
#region collect key: value and ProtocolIdentifier
if (!string.IsNullOrEmpty(line))
{
if (wait4identiier && line.StartsWith("Asterisk Call Manager"))
{
wait4identiier = false;
ConnectEvent connectEvent = new ConnectEvent(mrConnector);
connectEvent.ProtocolIdentifier = line;
mrConnector.DispatchEvent(connectEvent);
continue;
}
if (line.Trim().ToLower(Helper.CultureInfo) == "response: follows")
{
// Switch to wait "--END COMMAND--" mode
processingCommandResult = true;
packet.Clear();
commandList.Clear();
Helper.AddKeyValue(packet, line);
continue;
}
Helper.AddKeyValue(packet, line);
continue;
}
#endregion
#region process events and responses
if (packet.ContainsKey("event"))
mrConnector.DispatchEvent(packet);
else if (packet.ContainsKey("response"))
mrConnector.DispatchResponse(packet);
#endregion
packet.Clear();
}
if(mrSocket != null)
mrSocket.Close();
break;
}
#if LOGGER
catch (Exception ex)
{
logger.Info("Exception : {0}", ex.Message);
#else
catch
{
#endif
}
if (die)
break;
#if LOGGER
logger.Info("No die, any error - send disconnect.");
#endif
mrConnector.DispatchEvent(new DisconnectEvent(mrConnector));
}
}