/// <summary>
/// Starts a new listening connection, if there is capacity.
/// </summary>
private void Add()
{
lock (_namedPipeConnections)
{
// Sanity check, this will remove any connections that were terminated before they could tell us!
// ReSharper disable once PossibleNullReferenceException
_namedPipeConnections.RemoveAll(c => c.State == PipeState.Closed);
if (_namedPipeConnections.Count >= MaximumConnections || _disposed)
{
return;
}
// Create a new connection.
NamedPipeConnection connection = new NamedPipeConnection(this);
_namedPipeConnections.Add(connection);
// Note we never start the connection until we've added it to the list, to avoid a race condition where
// it is removed before it is started.
connection.Start();
}
}
/// <summary>
/// Starts a new listening connection, if there is capacity.
/// </summary>
private void Add()
{
lock (_namedPipeConnections)
{
// Sanity check, this will remove any connections that were terminated before they could tell us!
// ReSharper disable once PossibleNullReferenceException
_namedPipeConnections.RemoveAll(c => c.State == PipeState.Closed);
if (_namedPipeConnections.Count >= MaximumConnections || _disposed) return;
// Create a new connection.
NamedPipeConnection connection = new NamedPipeConnection(this);
_namedPipeConnections.Add(connection);
// Note we never start the connection until we've added it to the list, to avoid a race condition where
// it is removed before it is started.
connection.Start();
}
}
/// <summary>
/// Initializes a new instance of the <see cref="NamedPipeServer" /> class.
/// </summary>
/// <param name="service">The service.</param>
/// <param name="configuration">The configuration.</param>
/// <exception cref="ServiceException">
/// </exception>
public NamedPipeServer(
[NotNull] BaseService service,
[NotNull] ServerConfig configuration)
{
if (service == null)
{
throw new ArgumentNullException("service");
}
if (configuration == null)
{
throw new ArgumentNullException("configuration");
}
if (configuration.MaximumConnections < 1)
{
throw new ArgumentOutOfRangeException("configuration", CommonResources.NamedPipeServer_MaxConnections);
}
Service = service;
MaximumConnections = configuration.MaximumConnections;
if (!string.IsNullOrWhiteSpace(configuration.Name))
{
// ReSharper disable once AssignNullToNotNullAttribute
Name = configuration.Name;
}
else
{
StringBuilder builder = new StringBuilder();
builder.Append(Guid.NewGuid().ToString("D"))
.Append('_');
Debug.Assert(service.ServiceName != null);
foreach (char c in service.ServiceName)
{
builder.Append(char.IsLetterOrDigit(c) ? c : '_');
}
builder.Append(Constants.NameSuffix);
Name = builder.ToString();
}
// Create security context
try
{
WindowsIdentity currentIdentity = WindowsIdentity.GetCurrent();
if (currentIdentity == null ||
currentIdentity.Owner == null)
{
throw new ServiceException(() => ServiceResources.Err_NamedPipeServer_CannotGetCurrentOwner);
}
_pipeSecurity = new PipeSecurity();
_pipeSecurity.AddAccessRule(
new PipeAccessRule(
configuration.Identity,
PipeAccessRights.ReadWrite,
AccessControlType.Allow));
_pipeSecurity.AddAccessRule(
new PipeAccessRule(
currentIdentity.Owner,
PipeAccessRights.FullControl,
AccessControlType.Allow));
}
catch (Exception exception)
{
throw new ServiceException(exception, () => ServiceResources.Err_NamedPipeServer_Fatal_Error_Securing);
}
// Check no one has tried to create the pipe before us, combined with the GUID name this makes the most common
// form of pipe attack (pre-registration) impossible.
if (File.Exists(@"\\.\pipe\" + Name))
{
throw new ServiceException(() => ServiceResources.Err_NamedPipeServer_PipeAlreadyExists);
}
// Create a connection, before adding it to the list and starting.
NamedPipeConnection connection = new NamedPipeConnection(this);
_namedPipeConnections = new List <NamedPipeConnection>(MaximumConnections)
{
connection
};
connection.Start();
_logger = new NamedPipeServerLogger(this);
Log.AddLogger(_logger);
_heartbeat = configuration.Heartbeat;
if (_heartbeat < TimeSpan.Zero)
{
return;
}
_connectionCheckTimer = new Timer(CheckConnections);
_connectionCheckTimer.Change(_heartbeat, Timeout.InfiniteTimeSpan);
}
/// <summary>
/// Initializes a new instance of the <see cref="NamedPipeServer" /> class.
/// </summary>
/// <param name="service">The service.</param>
/// <param name="configuration">The configuration.</param>
/// <exception cref="ServiceException">
/// </exception>
public NamedPipeServer(
[NotNull] BaseService service,
[NotNull] ServerConfig configuration)
{
if (service == null) throw new ArgumentNullException("service");
if (configuration == null) throw new ArgumentNullException("configuration");
if (configuration.MaximumConnections < 1)
throw new ArgumentOutOfRangeException("configuration", CommonResources.NamedPipeServer_MaxConnections);
Service = service;
MaximumConnections = configuration.MaximumConnections;
if (!string.IsNullOrWhiteSpace(configuration.Name))
// ReSharper disable once AssignNullToNotNullAttribute
Name = configuration.Name;
else
{
StringBuilder builder = new StringBuilder();
builder.Append(Guid.NewGuid().ToString("D"))
.Append('_');
Debug.Assert(service.ServiceName != null);
foreach (char c in service.ServiceName)
builder.Append(char.IsLetterOrDigit(c) ? c : '_');
builder.Append(Constants.NameSuffix);
Name = builder.ToString();
}
// Create security context
try
{
WindowsIdentity currentIdentity = WindowsIdentity.GetCurrent();
if (currentIdentity == null ||
currentIdentity.Owner == null)
throw new ServiceException(() => ServiceResources.Err_NamedPipeServer_CannotGetCurrentOwner);
_pipeSecurity = new PipeSecurity();
_pipeSecurity.AddAccessRule(
new PipeAccessRule(
configuration.Identity,
PipeAccessRights.ReadWrite,
AccessControlType.Allow));
_pipeSecurity.AddAccessRule(
new PipeAccessRule(
currentIdentity.Owner,
PipeAccessRights.FullControl,
AccessControlType.Allow));
}
catch (Exception exception)
{
throw new ServiceException(exception, () => ServiceResources.Err_NamedPipeServer_Fatal_Error_Securing);
}
// Check no one has tried to create the pipe before us, combined with the GUID name this makes the most common
// form of pipe attack (pre-registration) impossible.
if (File.Exists(@"\\.\pipe\" + Name))
throw new ServiceException(() => ServiceResources.Err_NamedPipeServer_PipeAlreadyExists);
// Create a connection, before adding it to the list and starting.
NamedPipeConnection connection = new NamedPipeConnection(this);
_namedPipeConnections = new List<NamedPipeConnection>(MaximumConnections) { connection };
connection.Start();
_logger = new NamedPipeServerLogger(this);
Log.AddLogger(_logger);
_heartbeat = configuration.Heartbeat;
if (_heartbeat < TimeSpan.Zero) return;
_connectionCheckTimer = new Timer(CheckConnections);
_connectionCheckTimer.Change(_heartbeat, Timeout.InfiniteTimeSpan);
}
