public ConnectionConfiguration()
{
// set default values
Port = DefaultPort;
VirtualHost = "/";
UserName = "******";
Password = "******";
RequestedHeartbeat = 10;
Timeout = 10; // seconds
PublisherConfirms = false;
PersistentMessages = true;
UseBackgroundThreads = false;
ConnectIntervalAttempt = TimeSpan.FromSeconds(5);
DispatcherQueueSize = 1024;
// prefetchCount determines how many messages will be allowed in the local in-memory queue
// setting to zero makes this infinite, but risks an out-of-memory exception.
// set to 50 based on this blog post:
// http://www.rabbitmq.com/blog/2012/04/25/rabbitmq-performance-measurements-part-2/
PrefetchCount = 50;
AuthMechanisms = new IAuthMechanismFactory[] { new PlainMechanismFactory() };
Hosts = new List <HostConfiguration>();
Ssl = new SslOption();
ClientProperties = new Dictionary <string, object>();
}
/// <summary>
/// Given a list of mechanism names supported by the server, select a preferred mechanism,
/// or null if we have none in common.
/// </summary>
public IAuthMechanismFactory AuthMechanismFactory(IList <string> mechanismNames)
{
// Our list is in order of preference, the server one is not.
for (int index = 0; index < AuthMechanisms.Count; index++)
{
IAuthMechanismFactory factory = AuthMechanisms[index];
string factoryName = factory.Name;
if (mechanismNames.Any <string>(x => string.Equals(x, factoryName, StringComparison.OrdinalIgnoreCase)))
{
return(factory);
}
}
return(null);
}
private void StartAndTune()
{
var connectionStartCell = new BlockingCell <ConnectionStartDetails>();
_model0.m_connectionStartCell = connectionStartCell;
_model0.HandshakeContinuationTimeout = _config.HandshakeContinuationTimeout;
_frameHandler.ReadTimeout = _config.HandshakeContinuationTimeout;
_frameHandler.SendHeader();
ConnectionStartDetails connectionStart = connectionStartCell.WaitForValue();
if (connectionStart is null)
{
throw new IOException("connection.start was never received, likely due to a network timeout");
}
ServerProperties = connectionStart.m_serverProperties;
var serverVersion = new AmqpVersion(connectionStart.m_versionMajor, connectionStart.m_versionMinor);
if (!serverVersion.Equals(Protocol.Version))
{
TerminateMainloop();
FinishClose();
throw new ProtocolVersionMismatchException(Protocol.MajorVersion, Protocol.MinorVersion, serverVersion.Major, serverVersion.Minor);
}
// FIXME: parse out locales properly!
ConnectionTuneDetails connectionTune = default;
bool tuned = false;
try
{
string mechanismsString = Encoding.UTF8.GetString(connectionStart.m_mechanisms);
IAuthMechanismFactory mechanismFactory = GetAuthMechanismFactory(mechanismsString);
IAuthMechanism mechanism = mechanismFactory.GetInstance();
byte[]? challenge = null;
do
{
byte[] response = mechanism.handleChallenge(challenge, _config);
ConnectionSecureOrTune res;
if (challenge is null)
{
res = _model0.ConnectionStartOk(ClientProperties,
mechanismFactory.Name,
response,
"en_US");
}
else
{
res = _model0.ConnectionSecureOk(response);
}
if (res.m_challenge is null)
{
connectionTune = res.m_tuneDetails;
tuned = true;
}
else
{
challenge = res.m_challenge;
}
}while (!tuned);
}
catch (OperationInterruptedException e)
{
if (e.ShutdownReason != null && e.ShutdownReason.ReplyCode == Constants.AccessRefused)
{
throw new AuthenticationFailureException(e.ShutdownReason.ReplyText);
}
throw new PossibleAuthenticationFailureException(
"Possibly caused by authentication failure", e);
}
ushort channelMax = (ushort)NegotiatedMaxValue(_config.MaxChannelCount, connectionTune.m_channelMax);
_sessionManager = new SessionManager(this, channelMax);
uint frameMax = NegotiatedMaxValue(_config.MaxFrameSize, connectionTune.m_frameMax);
FrameMax = frameMax;
MaxPayloadSize = frameMax == 0 ? int.MaxValue : (int)frameMax - Client.Impl.Framing.BaseFrameSize;
uint heartbeatInSeconds = NegotiatedMaxValue((uint)_config.HeartbeatInterval.TotalSeconds, (uint)connectionTune.m_heartbeatInSeconds);
Heartbeat = TimeSpan.FromSeconds(heartbeatInSeconds);
_model0.ConnectionTuneOk(channelMax, frameMax, (ushort)Heartbeat.TotalSeconds);
// now we can start heartbeat timers
MaybeStartHeartbeatTimers();
}
protected void StartAndTune()
{
var connectionStartCell = new BlockingCell();
m_model0.m_connectionStartCell = connectionStartCell;
m_model0.HandshakeContinuationTimeout = m_factory.HandshakeContinuationTimeout;
m_frameHandler.ReadTimeout = (int)m_factory.HandshakeContinuationTimeout.TotalMilliseconds;
m_frameHandler.SendHeader();
var connectionStart = (ConnectionStartDetails)
connectionStartCell.Value;
if (connectionStart == null)
{
throw new IOException("connection.start was never received, likely due to a network timeout");
}
ServerProperties = connectionStart.m_serverProperties;
var serverVersion = new AmqpVersion(connectionStart.m_versionMajor,
connectionStart.m_versionMinor);
if (!serverVersion.Equals(Protocol.Version))
{
TerminateMainloop();
FinishClose();
throw new ProtocolVersionMismatchException(Protocol.MajorVersion,
Protocol.MinorVersion,
serverVersion.Major,
serverVersion.Minor);
}
ClientProperties = new Dictionary <string, object>(m_factory.ClientProperties)
{
["capabilities"] = Protocol.Capabilities,
["connection_name"] = ClientProvidedName
};
// FIXME: parse out locales properly!
ConnectionTuneDetails connectionTune = default;
bool tuned = false;
try
{
string mechanismsString = Encoding.UTF8.GetString(connectionStart.m_mechanisms, 0, connectionStart.m_mechanisms.Length);
string[] mechanisms = mechanismsString.Split(' ');
IAuthMechanismFactory mechanismFactory = m_factory.AuthMechanismFactory(mechanisms);
if (mechanismFactory == null)
{
throw new IOException("No compatible authentication mechanism found - " +
"server offered [" + mechanismsString + "]");
}
IAuthMechanism mechanism = mechanismFactory.GetInstance();
byte[] challenge = null;
do
{
byte[] response = mechanism.HandleChallenge(challenge, m_factory);
ConnectionSecureOrTune res;
if (challenge == null)
{
res = m_model0.ConnectionStartOk(ClientProperties,
mechanismFactory.Name,
response,
"en_US");
}
else
{
res = m_model0.ConnectionSecureOk(response);
}
if (res.m_challenge == null)
{
connectionTune = res.m_tuneDetails;
tuned = true;
}
else
{
challenge = res.m_challenge;
}
}while (!tuned);
}
catch (OperationInterruptedException e)
{
if (e.ShutdownReason?.ReplyCode == Constants.AccessRefused)
{
throw new AuthenticationFailureException(e.ShutdownReason.ReplyText);
}
throw new PossibleAuthenticationFailureException(
"Possibly caused by authentication failure", e);
}
var channelMax = (ushort)NegotiatedMaxValue(m_factory.RequestedChannelMax,
connectionTune.m_channelMax);
m_sessionManager = new SessionManager(this, channelMax);
uint frameMax = NegotiatedMaxValue(m_factory.RequestedFrameMax,
connectionTune.m_frameMax);
FrameMax = frameMax;
var heartbeat = (ushort)NegotiatedMaxValue(m_factory.RequestedHeartbeat,
connectionTune.m_heartbeat);
Heartbeat = heartbeat;
m_model0.ConnectionTuneOk(channelMax,
frameMax,
heartbeat);
// now we can start heartbeat timers
MaybeStartHeartbeatTimers();
}
