private void Accept_Completed(Socket none, ServerAsyncEventArgs e)
{
Socket acceptSocket = e.AcceptSocket;
SocketError socketError = e.SocketError;
while (true)
{
int num = Thread.VolatileRead(ref this.acceptBacklog);
if (this.isRunning && num <= this.minAcceptBacklog)
{
break;
}
if (Interlocked.CompareExchange(ref this.acceptBacklog, num - 1, num) == num)
{
goto Block_3;
}
}
e.AcceptSocket = null;
this.listener.AcceptAsync(e, new ServerAsyncEventArgs.CompletedEventHandler(this.Accept_Completed));
goto IL_66;
Block_3:
EventArgsManager.Put(e);
IL_66:
Server <C> .Connection <C> connection = this.CreateConnection(acceptSocket, socketError);
if (connection != null)
{
this.NewTcpConnection(connection);
}
}
private void Receive_Completed(Socket socket, ServerAsyncEventArgs e)
{
try
{
Server <C> .Connection <C> connection;
this.connections.TryGetValue(e.RemoteEndPoint, out connection);
if (connection != null && connection.Socket == socket && connection.Id == e.ConnectionId)
{
while (true)
{
if (e != null)
{
connection.ReceiveQueue.Put(e);
e = null;
}
e = connection.ReceiveQueue.GetCurrent();
if (e == null)
{
goto IL_D4;
}
bool flag = true;
if (this.isRunning && e.BytesTransferred > 0 && e.SocketError == SocketError.Success)
{
flag = !this.OnTcpReceived(connection, ref e);
}
if (flag)
{
break;
}
connection.ReceiveQueue.Next();
if (e == null)
{
e = EventArgsManager.Get();
}
else
{
e.SetDefaultValue();
}
if (this.TcpReceiveAsync(connection, e))
{
e = null;
}
}
this.connections.Remove(connection.RemoteEndPoint, connection);
this.EndTcpConnection(connection);
}
IL_D4 :;
}
finally
{
if (e != null)
{
EventArgsManager.Put(ref e);
}
}
}
public void Dispose()
{
if (this.isPooled)
{
BufferManager.Free(ref this.segment);
this.socketArgs.Dispose();
return;
}
EventArgsManager.Put(this);
}
public void Put(ServerAsyncEventArgs e)
{
int num = e.SequenceNumber % this.size;
Interlocked.Exchange <ServerAsyncEventArgs>(ref this.queue[num], e);
if (this.disposed && Interlocked.Exchange <ServerAsyncEventArgs>(ref this.queue[num], null) != null)
{
EventArgsManager.Put(e);
}
}
public void Dispose()
{
if (isPooled)
{
BufferManager.Free(ref segment);
socketArgs.Dispose();
}
else
{
EventArgsManager.Put(this);
}
}
public ServerAsyncEventArgs CreateDeepCopy()
{
ServerAsyncEventArgs serverAsyncEventArgs = EventArgsManager.Get();
serverAsyncEventArgs.CopyAddressesFrom(this);
serverAsyncEventArgs.offsetOffset = this.offsetOffset;
serverAsyncEventArgs.count = this.count;
serverAsyncEventArgs.AllocateBuffer();
serverAsyncEventArgs.bytesTransferred = this.bytesTransferred;
serverAsyncEventArgs.UserTokenForSending = this.UserTokenForSending;
System.Buffer.BlockCopy(this.Buffer, this.Offset, serverAsyncEventArgs.Buffer, serverAsyncEventArgs.Offset, serverAsyncEventArgs.Count);
return(serverAsyncEventArgs);
}
public void Dispose()
{
this.disposed = true;
ServerAsyncEventArgs serverAsyncEventArgs = null;
for (int i = 0; i < this.queue.Length; i++)
{
if (this.queue[i] != null)
{
serverAsyncEventArgs = Interlocked.Exchange <ServerAsyncEventArgs>(ref this.queue[i], null);
}
if (serverAsyncEventArgs != null)
{
EventArgsManager.Put(ref serverAsyncEventArgs);
}
}
}
public ServerAsyncEventArgs CreateDeepCopy()
{
var e2 = EventArgsManager.Get();
e2.CopyAddressesFrom(this);
e2.offsetOffset = offsetOffset;
e2.count = count;
e2.AllocateBuffer();
e2.bytesTransferred = bytesTransferred;
e2.UserTokenForSending = UserTokenForSending;
System.Buffer.BlockCopy(Buffer, Offset, e2.Buffer, e2.Offset, e2.Count);
return(e2);
}
private ArraySegment <byte> Detach(ref ServerAsyncEventArgs e, int size)
{
ServerAsyncEventArgs serverAsyncEventArgs = null;
if (e.BytesTransferred > size)
{
serverAsyncEventArgs = e.CreateDeepCopy();
}
ArraySegment <byte> result = e.DetachBuffer();
EventArgsManager.Put(ref e);
if (serverAsyncEventArgs != null)
{
e = serverAsyncEventArgs;
}
return(result);
}
private void EndTcpConnection(Server <C> .Connection <C> connection)
{
if (connection.Close())
{
this.OnEndTcpConnection(connection);
if (connection.Socket.Connected)
{
try
{
connection.Socket.Shutdown(SocketShutdown.Both);
}
catch (SocketException)
{
}
}
if (connection.IsSocketAccepted && this.socketReuseEnabled)
{
try
{
try
{
ServerAsyncEventArgs serverAsyncEventArgs = EventArgsManager.Get();
serverAsyncEventArgs.FreeBuffer();
serverAsyncEventArgs.DisconnectReuseSocket = true;
serverAsyncEventArgs.Completed = new ServerAsyncEventArgs.CompletedEventHandler(this.Disconnect_Completed);
if (!connection.Socket.DisconnectAsync(serverAsyncEventArgs))
{
serverAsyncEventArgs.OnCompleted(connection.Socket);
}
}
catch (SocketException)
{
}
}
catch (NotSupportedException)
{
this.socketReuseEnabled = false;
}
}
if (!this.socketReuseEnabled)
{
connection.Socket.Close();
}
}
}
private void Server_Sent(Server <C> server, ServerAsyncEventArgs e)
{
try
{
if (this.Sent != null)
{
this.Sent(this, ref e);
}
if (e != null)
{
EventArgsManager.Put(e);
}
}
catch (Exception innerException)
{
throw new Exception("Error in Sent event handler", innerException);
}
}
private ArraySegment <byte> Detach(ref ServerAsyncEventArgs e, int size)
{
ServerAsyncEventArgs copy = null;
if (e.BytesTransferred > size)
{
copy = e.CreateDeepCopy();
}
var result = e.DetachBuffer();
EventArgsManager.Put(ref e);
if (copy != null)
{
e = copy;
}
return(result);
}
public void Dispose()
{
disposed = true;
var e = default(ServerAsyncEventArgs);
for (int i = 0; i < queue.Length; i++)
{
if (queue[i] != null)
{
e = Interlocked.Exchange <ServerAsyncEventArgs>(ref queue[i], null);
}
if (e != null)
{
EventArgsManager.Put(ref e);
}
}
}
private void NewTcpConnection(Server <C> .Connection <C> connection)
{
this.OnNewTcpConnection(connection);
ServerAsyncEventArgs serverAsyncEventArgs;
for (int i = 0; i < this.receiveQueueSize; i++)
{
serverAsyncEventArgs = EventArgsManager.Get();
if (!this.TcpReceiveAsync(connection, serverAsyncEventArgs))
{
connection.ReceiveQueue.Put(serverAsyncEventArgs);
}
}
serverAsyncEventArgs = connection.ReceiveQueue.GetCurrent();
if (serverAsyncEventArgs != null)
{
this.Receive_Completed(connection.Socket, serverAsyncEventArgs);
}
}
private void EndTcpConnection(Connection <C> connection)
{
if (connection.Close())
{
OnEndTcpConnection(connection);
if (connection.Socket.Connected)
{
try { connection.Socket.Shutdown(SocketShutdown.Both); }
catch (SocketException) { }
}
if (connection.IsSocketAccepted && socketReuseEnabled)
{
try
{
try
{
var e = EventArgsManager.Get();
e.FreeBuffer();
e.DisconnectReuseSocket = true;
e.Completed = Disconnect_Completed;
if (connection.Socket.DisconnectAsync(e) == false)
{
e.OnCompleted(connection.Socket);
}
}
catch (SocketException) { }
}
catch (NotSupportedException)
{
socketReuseEnabled = false;
}
}
if (socketReuseEnabled == false)
{
connection.Socket.Close();
}
}
}
private void ReceiveFrom_Completed(Socket socket, ServerAsyncEventArgs e)
{
while (isRunning)
{
if (e.SocketError == SocketError.Success)
{
OnReceived(null, ref e);
if (e == null)
{
e = EventArgsManager.Get();
}
PrepareBuffer(e);
try
{
if (socket.ReceiveFromAsync(e))
{
e = null;
break;
}
}
catch (ObjectDisposedException)
{
}
}
else
{
if (isRunning)
{
Dispose();
OnFailed(new ServerInfoEventArgs(realEndPoint, e.SocketError));
}
}
}
if (e != null)
{
EventArgsManager.Put(e);
}
}
private void EnqueueAsyncAccepts(object stateInfo)
{
lock (this.sync)
{
while (true)
{
int num = Thread.VolatileRead(ref this.acceptBacklog);
if (!this.isRunning || num >= this.minAcceptBacklog)
{
break;
}
if (Interlocked.CompareExchange(ref this.acceptBacklog, num + 1, num) == num)
{
ServerAsyncEventArgs serverAsyncEventArgs = EventArgsManager.Get();
serverAsyncEventArgs.FreeBuffer();
this.listener.AcceptAsync(serverAsyncEventArgs, new ServerAsyncEventArgs.CompletedEventHandler(this.Accept_Completed));
}
}
}
}
public void Put(ServerAsyncEventArgs e)
{
int index = e.SequenceNumber % size;
#if DEBUG
if (queue[index] != null)
{
throw new InvalidOperationException();
}
#endif
Interlocked.Exchange <ServerAsyncEventArgs>(ref queue[index], e);
if (disposed)
{
if (Interlocked.Exchange <ServerAsyncEventArgs>(ref queue[index], null) != null)
{
EventArgsManager.Put(e);
}
}
}
public ServersManager(ServersManagerConfig config)
{
if (!BufferManager.IsInitialized())
{
BufferManager.Initialize(256);
}
if (!EventArgsManager.IsInitialized())
{
EventArgsManager.Initialize();
}
this.running = false;
this.sync = new object();
this.protocolPorts = new List <ProtocolPort>();
this.servers = new ThreadSafeDictionary <ServerEndPoint, Server <C> >();
this.fakeServers = new ThreadSafeDictionary <ServerEndPoint, Server <C> >();
this.AddressPredicate = new Func <NetworkInterface, IPInterfaceProperties, UnicastIPAddressInformation, bool>(ServersManager <C> .DefaultAddressPredicate);
this.FakeAddressAction = new Func <ServerEndPoint, IPEndPoint>(ServersManager <C> .DefaultFakeAddressAction);
this.config = config;
this.nextPort = config.MinPort;
this.logger = new Logger();
}
private void EnqueueBuffers(Object stateInfo)
{
int count = (int)stateInfo;
lock (sync)
{
if (socket != null)
{
for (int i = 0; i < count && isRunning; i++)
{
var e = EventArgsManager.Get();
PrepareBuffer(e);
if (socket.ReceiveFromAsync(e) == false)
{
e.OnCompleted(socket);
}
}
}
}
}
private void EnqueueBuffers(object stateInfo)
{
int num = (int)stateInfo;
lock (this.sync)
{
if (this.socket != null)
{
int num2 = 0;
while (num2 < num && this.isRunning)
{
ServerAsyncEventArgs serverAsyncEventArgs = EventArgsManager.Get();
this.PrepareBuffer(serverAsyncEventArgs);
if (!this.socket.ReceiveFromAsync(serverAsyncEventArgs))
{
serverAsyncEventArgs.OnCompleted(this.socket);
}
num2++;
}
}
}
}
private void NewTcpConnection(Connection <C> connection)
{
OnNewTcpConnection(connection);
ServerAsyncEventArgs e;
for (int i = 0; i < receiveQueueSize; i++)
{
e = EventArgsManager.Get();
if (TcpReceiveAsync(connection, e) == false)
{
connection.ReceiveQueue.Put(e);
}
}
e = connection.ReceiveQueue.GetCurrent();
if (e != null)
{
Receive_Completed(connection.Socket, e);
}
}
private void EnqueueAsyncAccepts(Object stateInfo)
{
lock (sync)
{
for (; ;)
{
int backlog = Thread.VolatileRead(ref acceptBacklog);
if (isRunning && backlog < minAcceptBacklog)
{
if (Interlocked.CompareExchange(ref acceptBacklog, backlog + 1, backlog) == backlog)
{
var e = EventArgsManager.Get();
e.FreeBuffer();
listener.AcceptAsync(e, Accept_Completed);
}
}
else
{
break;
}
}
}
}
private void Receive_Completed(Socket socket, ServerAsyncEventArgs e)
{
try
{
Connection <C> connection;
connections.TryGetValue(e.RemoteEndPoint, out connection);
if (connection != null && connection.Socket == socket && connection.Id == e.ConnectionId)
{
for (; ;)
{
if (e != null)
{
connection.ReceiveQueue.Put(e);
e = null;
}
e = connection.ReceiveQueue.GetCurrent();
if (e == null)
{
break;
}
bool close = true;
if (isRunning && e.BytesTransferred > 0 && e.SocketError == SocketError.Success)
{
close = !OnTcpReceived(connection, ref e);
}
if (close)
{
connections.Remove(connection.RemoteEndPoint, connection);
EndTcpConnection(connection);
break;
}
else
{
connection.ReceiveQueue.Next();
}
if (e == null)
{
e = EventArgsManager.Get();
}
else
{
e.SetDefaultValue();
}
if (TcpReceiveAsync(connection, e))
{
e = null;
}
}
}
#if DEBUG
else
{
if (e.BytesTransferred > 0)
{
Console.WriteLine("ERROR: {0}, conn-handle: {1}, socket-handle: {2}, ip: {3}", e.BytesTransferred,
(connection == null) ? "Null" : connection.Socket.Handle.ToString(), socket.Handle.ToString(),
e.RemoteEndPoint.ToString());
}
}
#endif
}
finally
{
if (e != null)
{
EventArgsManager.Put(ref e);
}
}
}
unsafe private bool DecryptData(ref ServerAsyncEventArgs e, Connection <C> connection)
{
var context = connection.SspiContext;
var message = context.SecBufferDesc5;
if (context.Buffer.IsValid && e != null)
{
if (context.Buffer.CopyTransferredFrom(e, 0) == false)
{
return(false);
}
}
for (; ;)
{
// prepare buffer
//
message.Buffers[0].BufferType = BufferType.SECBUFFER_DATA;
if (context.Buffer.IsValid)
{
SetSecBuffer(ref message.Buffers[0], context);
}
else
{
SetSecBuffer(ref message.Buffers[0], e);
}
message.Buffers[1].SetBufferEmpty();
message.Buffers[2].SetBufferEmpty();
message.Buffers[3].SetBufferEmpty();
message.Buffers[4].SetBufferEmpty();
// call SSPI
//
var result = Sspi.SafeDecryptMessage(ref context.Handle, ref message, 0, null);
// analize result
//
int extraIndex = message.GetBufferIndex(BufferType.SECBUFFER_EXTRA, 0);
int dataIndex = message.GetBufferIndex(BufferType.SECBUFFER_DATA, 0);
switch (result)
{
case SecurityStatus.SEC_E_OK:
if (dataIndex >= 0)
{
if (context.Buffer.IsInvalid)
{
if (extraIndex >= 0)
{
if (context.Buffer.CopyFrom(message.Buffers[extraIndex]) == false)
{
return(false);
}
}
e.Offset = message.Buffers[dataIndex].Offset;
e.BytesTransferred = message.Buffers[dataIndex].Size;
e.SetMaxCount();
if (OnReceived(connection, ref e) == false)
{
return(false);
}
}
else
{
var buffer = context.Buffer.Detach();
if (extraIndex >= 0)
{
if (context.Buffer.CopyFrom(message.Buffers[extraIndex]) == false)
{
return(false);
}
}
// create eventarg and call onreceived event
//
var e2 = EventArgsManager.Get();
base.PrepareEventArgs(connection, e2);
e2.AttachBuffer(buffer);
e2.Offset = message.Buffers[dataIndex].Offset;
e2.BytesTransferred = message.Buffers[dataIndex].Size;
e2.SetMaxCount();
bool continue1 = OnReceived(connection, ref e2);
if (e2 != null)
{
EventArgsManager.Put(e2);
}
if (continue1 == false)
{
return(false);
}
}
if (extraIndex >= 0)
{
continue;
}
return(true);
}
return(false);
case SecurityStatus.SEC_E_INCOMPLETE_MESSAGE:
if (context.Buffer.IsInvalid)
{
if (context.Buffer.CopyTransferredFrom(e, 0) == false)
{
return(false);
}
}
return(true);
case SecurityStatus.SEC_I_RENEGOTIATE:
// MSDN: Renegotiation is not supported for Schannel kernel mode. The
// caller should either ignore this return value or shut down the
// connection.
// If the value is ignored, either the client or the server might shut
// down the connection as a result.
return(false);
default:
return(false);
}
}
}
private unsafe bool Handshake(ServerAsyncEventArgs ie, Connection <C> connection)
{
int contextAttr = 0;
ServerAsyncEventArgs oe = null;
var context = connection.SspiContext;
var input = context.SecBufferDesc2[0];
var output = context.SecBufferDesc2[1];
try
{
if (context.Buffer.IsValid && ie != null)
{
if (context.Buffer.CopyTransferredFrom(ie, 0) == false)
{
return(false);
}
}
for (; ;)
{
// prepare input buffer
//
input.Buffers[0].BufferType = BufferType.SECBUFFER_TOKEN;
if (context.Buffer.IsValid)
{
SetSecBuffer(ref input.Buffers[0], context);
}
else
{
SetSecBuffer(ref input.Buffers[0], ie);
}
input.Buffers[1].SetBufferEmpty();
// prepare output buffer
//
if (oe == null)
{
oe = EventArgsManager.Get();
}
oe.AllocateBuffer();
output.Buffers[0].BufferType = BufferType.SECBUFFER_TOKEN;
output.Buffers[0].Size = oe.Count;
output.Buffers[0].Buffer = oe.Buffer;
output.Buffers[0].Offset = oe.Offset;
output.Buffers[1].SetBufferEmpty();
// prepare some args and call SSPI
//
int contextReq = (int)(ContextReq.ASC_REQ_SEQUENCE_DETECT |
ContextReq.ASC_REQ_REPLAY_DETECT |
ContextReq.ASC_REQ_CONFIDENTIALITY |
ContextReq.ASC_REQ_EXTENDED_ERROR |
ContextReq.ASC_REQ_STREAM);
var newHandle = (context.Handle.IsInvalid) ? new SafeCtxtHandle() : context.Handle;
long timeStamp;
var result = Sspi.SafeAcceptSecurityContext(
ref credential,
ref context.Handle,
ref input,
contextReq,
TargetDataRep.SECURITY_NATIVE_DREP,
ref newHandle,
ref output,
out contextAttr,
out timeStamp);
if (context.Handle.IsInvalid)
{
context.Handle = newHandle;
}
// proccess non-critical errors
//
switch (result)
{
case SecurityStatus.SEC_E_INCOMPLETE_MESSAGE:
if (context.Buffer.IsInvalid)
{
if (context.Buffer.CopyTransferredFrom(ie, 0) == false)
{
return(false);
}
}
return(true);
case SecurityStatus.SEC_E_BUFFER_TOO_SMALL:
if (oe.Count < maxTokenSize)
{
oe.Count = maxTokenSize;
oe.ReAllocateBuffer(false);
continue;
}
return(false);
}
// send response to client
//
if (result == SecurityStatus.SEC_I_CONTINUE_NEEDED || result == SecurityStatus.SEC_E_OK ||
(Sspi.Failed(result) && (contextAttr & (int)ContextAttr.ASC_RET_EXTENDED_ERROR) != 0))
{
if (output.Buffers[0].Size > 0)
{
oe.Count = output.Buffers[0].Size;
oe.CopyAddressesFrom(ie);
oe.LocalEndPoint = GetLocalEndpoint(ie.RemoteEndPoint.Address);
base.SendAsync(connection, oe);
oe = null;
}
}
// move extra data to buffer
//
int extraIndex = input.GetBufferIndex(BufferType.SECBUFFER_EXTRA, 0);
if (extraIndex < 0)
{
context.Buffer.Free();
}
else
{
if (context.Buffer.IsInvalid)
{
if (context.Buffer.CopyTransferredFrom(ie,
ie.BytesTransferred - input.Buffers[extraIndex].Size) == false)
{
return(false);
}
}
else
{
context.Buffer.MoveToBegin(context.Buffer.BytesTransferred - input.Buffers[extraIndex].Size,
input.Buffers[extraIndex].Size);
}
}
// proccess error-codes
//
switch (result)
{
case SecurityStatus.SEC_E_OK:
if (Sspi.SafeQueryContextAttributes(ref context.Handle, out context.StreamSizes)
!= SecurityStatus.SEC_E_OK)
{
return(false);
}
context.Connected = true;
OnNewConnection(connection);
return(true);
case SecurityStatus.SEC_I_CONTINUE_NEEDED:
if (extraIndex >= 0)
{
continue;
}
return(true);
default:
return(false);
}
}
}
finally
{
if (oe != null)
{
EventArgsManager.Put(ref oe);
}
}
}
private bool DecryptData(ref ServerAsyncEventArgs e, Server <C> .Connection <C> connection)
{
SspiContext sspiContext = connection.SspiContext;
SecBufferDescEx secBufferDesc = sspiContext.SecBufferDesc5;
if (sspiContext.Buffer.IsValid && e != null && !sspiContext.Buffer.CopyTransferredFrom(e, 0))
{
return(false);
}
SecurityStatus securityStatus2;
while (true)
{
secBufferDesc.Buffers[0].BufferType = BufferType.SECBUFFER_DATA;
if (sspiContext.Buffer.IsValid)
{
this.SetSecBuffer(ref secBufferDesc.Buffers[0], sspiContext);
}
else
{
this.SetSecBuffer(ref secBufferDesc.Buffers[0], e);
}
secBufferDesc.Buffers[1].SetBufferEmpty();
secBufferDesc.Buffers[2].SetBufferEmpty();
secBufferDesc.Buffers[3].SetBufferEmpty();
secBufferDesc.Buffers[4].SetBufferEmpty();
SecurityStatus securityStatus = Sspi.SafeDecryptMessage(ref sspiContext.Handle, ref secBufferDesc, 0u, null);
int bufferIndex = secBufferDesc.GetBufferIndex(BufferType.SECBUFFER_EXTRA, 0);
int bufferIndex2 = secBufferDesc.GetBufferIndex(BufferType.SECBUFFER_DATA, 0);
securityStatus2 = securityStatus;
if (securityStatus2 != SecurityStatus.SEC_E_OK)
{
break;
}
if (bufferIndex2 < 0)
{
return(false);
}
if (sspiContext.Buffer.IsInvalid)
{
if (bufferIndex >= 0 && !sspiContext.Buffer.CopyFrom(secBufferDesc.Buffers[bufferIndex]))
{
return(false);
}
e.Offset = secBufferDesc.Buffers[bufferIndex2].Offset;
e.BytesTransferred = secBufferDesc.Buffers[bufferIndex2].Size;
e.SetMaxCount();
if (!this.OnReceived(connection, ref e))
{
return(false);
}
}
else
{
ArraySegment <byte> buffer = sspiContext.Buffer.Detach();
if (bufferIndex >= 0 && !sspiContext.Buffer.CopyFrom(secBufferDesc.Buffers[bufferIndex]))
{
return(false);
}
ServerAsyncEventArgs serverAsyncEventArgs = EventArgsManager.Get();
base.PrepareEventArgs(connection, serverAsyncEventArgs);
serverAsyncEventArgs.AttachBuffer(buffer);
serverAsyncEventArgs.Offset = secBufferDesc.Buffers[bufferIndex2].Offset;
serverAsyncEventArgs.BytesTransferred = secBufferDesc.Buffers[bufferIndex2].Size;
serverAsyncEventArgs.SetMaxCount();
bool flag = this.OnReceived(connection, ref serverAsyncEventArgs);
if (serverAsyncEventArgs != null)
{
EventArgsManager.Put(serverAsyncEventArgs);
}
if (!flag)
{
return(false);
}
}
if (bufferIndex < 0)
{
return(true);
}
}
return(securityStatus2 != SecurityStatus.SEC_I_RENEGOTIATE && securityStatus2 == (SecurityStatus)2148074264u && (!sspiContext.Buffer.IsInvalid || sspiContext.Buffer.CopyTransferredFrom(e, 0)));
}
private bool Handshake(ServerAsyncEventArgs ie, Server <C> .Connection <C> connection)
{
int num = 0;
ServerAsyncEventArgs serverAsyncEventArgs = null;
SspiContext sspiContext = connection.SspiContext;
SecBufferDescEx secBufferDescEx = sspiContext.SecBufferDesc2[0];
SecBufferDescEx secBufferDescEx2 = sspiContext.SecBufferDesc2[1];
bool result;
try
{
if (sspiContext.Buffer.IsValid && ie != null && !sspiContext.Buffer.CopyTransferredFrom(ie, 0))
{
result = false;
}
else
{
while (true)
{
secBufferDescEx.Buffers[0].BufferType = BufferType.SECBUFFER_TOKEN;
if (sspiContext.Buffer.IsValid)
{
this.SetSecBuffer(ref secBufferDescEx.Buffers[0], sspiContext);
}
else
{
this.SetSecBuffer(ref secBufferDescEx.Buffers[0], ie);
}
secBufferDescEx.Buffers[1].SetBufferEmpty();
if (serverAsyncEventArgs == null)
{
serverAsyncEventArgs = EventArgsManager.Get();
}
serverAsyncEventArgs.AllocateBuffer();
secBufferDescEx2.Buffers[0].BufferType = BufferType.SECBUFFER_TOKEN;
secBufferDescEx2.Buffers[0].Size = serverAsyncEventArgs.Count;
secBufferDescEx2.Buffers[0].Buffer = serverAsyncEventArgs.Buffer;
secBufferDescEx2.Buffers[0].Offset = serverAsyncEventArgs.Offset;
secBufferDescEx2.Buffers[1].SetBufferEmpty();
int contextReq = 98332;
SafeCtxtHandle handle = sspiContext.Handle.IsInvalid ? new SafeCtxtHandle() : sspiContext.Handle;
long num2;
SecurityStatus securityStatus = Sspi.SafeAcceptSecurityContext(ref this.credential, ref sspiContext.Handle, ref secBufferDescEx, contextReq, TargetDataRep.SECURITY_NATIVE_DREP, ref handle, ref secBufferDescEx2, out num, out num2);
if (sspiContext.Handle.IsInvalid)
{
sspiContext.Handle = handle;
}
SecurityStatus securityStatus2 = securityStatus;
if (securityStatus2 == (SecurityStatus)2148074264u)
{
break;
}
if (securityStatus2 != (SecurityStatus)2148074273u)
{
if ((securityStatus == SecurityStatus.SEC_I_CONTINUE_NEEDED || securityStatus == SecurityStatus.SEC_E_OK || (Sspi.Failed(securityStatus) && (num & 32768) != 0)) && secBufferDescEx2.Buffers[0].Size > 0)
{
serverAsyncEventArgs.Count = secBufferDescEx2.Buffers[0].Size;
serverAsyncEventArgs.CopyAddressesFrom(ie);
serverAsyncEventArgs.LocalEndPoint = base.GetLocalEndpoint(ie.RemoteEndPoint.Address);
base.SendAsync(connection, serverAsyncEventArgs);
serverAsyncEventArgs = null;
}
int bufferIndex = secBufferDescEx.GetBufferIndex(BufferType.SECBUFFER_EXTRA, 0);
if (bufferIndex < 0)
{
sspiContext.Buffer.Free();
}
else if (sspiContext.Buffer.IsInvalid)
{
if (!sspiContext.Buffer.CopyTransferredFrom(ie, ie.BytesTransferred - secBufferDescEx.Buffers[bufferIndex].Size))
{
goto Block_21;
}
}
else
{
sspiContext.Buffer.MoveToBegin(sspiContext.Buffer.BytesTransferred - secBufferDescEx.Buffers[bufferIndex].Size, secBufferDescEx.Buffers[bufferIndex].Size);
}
SecurityStatus securityStatus3 = securityStatus;
if (securityStatus3 == SecurityStatus.SEC_E_OK)
{
goto IL_2FF;
}
if (securityStatus3 != SecurityStatus.SEC_I_CONTINUE_NEEDED)
{
goto Block_23;
}
if (bufferIndex < 0)
{
goto Block_25;
}
}
else
{
if (serverAsyncEventArgs.Count >= this.maxTokenSize)
{
goto IL_1DC;
}
serverAsyncEventArgs.Count = this.maxTokenSize;
serverAsyncEventArgs.ReAllocateBuffer(false);
}
}
if (sspiContext.Buffer.IsInvalid && !sspiContext.Buffer.CopyTransferredFrom(ie, 0))
{
result = false;
return(result);
}
result = true;
return(result);
IL_1DC:
result = false;
return(result);
Block_21:
result = false;
return(result);
Block_23:
result = false;
return(result);
IL_2FF:
if (Sspi.SafeQueryContextAttributes(ref sspiContext.Handle, out sspiContext.StreamSizes) != SecurityStatus.SEC_E_OK)
{
result = false;
return(result);
}
sspiContext.Connected = true;
this.OnNewConnection(connection);
result = true;
return(result);
Block_25:
result = true;
}
}
finally
{
if (serverAsyncEventArgs != null)
{
EventArgsManager.Put(ref serverAsyncEventArgs);
}
}
return(result);
}