/// <summary>
/// Create a SNI connection handle
/// </summary>
/// <param name="callbackObject">Asynchronous I/O callback object</param>
/// <param name="fullServerName">Full server name from connection string</param>
/// <param name="ignoreSniOpenTimeout">Ignore open timeout</param>
/// <param name="timerExpire">Timer expiration</param>
/// <param name="instanceName">Instance name</param>
/// <param name="spnBuffer">SPN</param>
/// <param name="flushCache">Flush packet cache</param>
/// <param name="async">Asynchronous connection</param>
/// <param name="parallel">Attempt parallel connects</param>
/// <returns>SNI handle</returns>
public SNIHandle CreateConnectionHandle(object callbackObject, string fullServerName, bool ignoreSniOpenTimeout, long timerExpire, out byte[] instanceName, ref byte[] spnBuffer, bool flushCache, bool async, bool parallel, bool isIntegratedSecurity)
{
instanceName = new byte[1];
bool errorWithLocalDBProcessing;
string localDBDataSource = GetLocalDBDataSource(fullServerName, out errorWithLocalDBProcessing);
if (errorWithLocalDBProcessing)
{
return(null);
}
// If a localDB Data source is available, we need to use it.
fullServerName = localDBDataSource ?? fullServerName;
DataSource details = DataSource.ParseServerName(fullServerName);
if (details == null)
{
return(null);
}
if (isIntegratedSecurity)
{
string hostName = details.ServerName;
int connPort = details.Port;
string connInstanceName = details.InstanceName;
try
{
spnBuffer = GetSqlServerSPN(hostName, (connPort >= 0 ? connPort.ToString() : connInstanceName));
}
catch (Exception e)
{
SNILoadHandle.SingletonInstance.LastError = new SNIError(SNIProviders.INVALID_PROV, SNICommon.ErrorSpnLookup, e);
return(null);
}
}
SNIHandle sniHandle = null;
switch (details.ConnectionProtocol)
{
case DataSource.Protocol.TCP:
sniHandle = CreateTcpHandle(details, timerExpire, callbackObject, parallel);
break;
case DataSource.Protocol.NP:
sniHandle = CreateNpHandle(details, timerExpire, callbackObject, parallel);
break;
case DataSource.Protocol.None:
// default to using tcp if no protocol is provided
sniHandle = CreateTcpHandle(details, timerExpire, callbackObject, parallel);
break;
default:
Debug.Fail($"Unexpected connection protocol: {details.ConnectionProtocol}");
break;
}
return(sniHandle);
}
