/// <summary>
/// to decode stack packet from the received message bytes.
/// </summary>
/// <param name = "endPoint">the endpoint from which the message bytes are received. </param>
/// <param name = "messageBytes">the received message bytes to be decoded. </param>
/// <param name = "consumedLength">the length of message bytes consumed by decoder. </param>
/// <param name = "expectedLength">the length of message bytes the decoder expects to receive. </param>
/// <returns>the stack packets decoded from the received message bytes. </returns>
public StackPacket[] DecodePacketCallback(
object endPoint,
byte[] messageBytes,
out int consumedLength,
out int expectedLength)
{
// initialize the default values
consumedLength = 0;
expectedLength = 0;
SmbPacket[] packets = new SmbPacket[0];
SmbPacket request = this.DecodeSmbRequestFromBytes(messageBytes, out consumedLength);
// Use the decoded packet to UpdateRoleContext if it is not null and ContextUpdate is enabled:
if (request != null)
{
if (this.serverContext.IsContextUpdateEnabled)
{
this.serverContext.UpdateRoleContext(this.serverContext.ConnectionTable[endPoint], request);
}
packets = new SmbPacket[] { request };
}
expectedLength = 0;
return packets;
}
/// <summary>
/// Deep copy constructor.
/// </summary>
/// <exception cref="System.ArgumentNullException">the smbPacket is null.</exception>
protected SmbPacket(SmbPacket smbPacket)
: base()
{
if (smbPacket == null)
{
throw new ArgumentNullException("smbPacket",
"the copy constructor of smbpacket can not accept null smbPacket.");
}
lock (smbPacket)
{
this.isSignatureCorrect = smbPacket.isSignatureCorrect;
this.transportHeader = new TransportHeader();
this.transportHeader.Zero = smbPacket.transportHeader.Zero;
this.transportHeader.StreamProtocolLength = new byte[3];
this.transportHeader.StreamProtocolLength = smbPacket.transportHeader.StreamProtocolLength;
this.SmbHeader = new SmbHeader();
this.smbHeader.Protocol = smbPacket.smbHeader.Protocol;
this.smbHeader.Command = smbPacket.smbHeader.Command;
this.smbHeader.Status = smbPacket.smbHeader.Status;
this.smbHeader.Flags = smbPacket.smbHeader.Flags;
this.smbHeader.Flags2 = smbPacket.smbHeader.Flags2;
this.smbHeader.PidHigh = smbPacket.smbHeader.PidHigh;
this.smbHeader.SecurityFeatures = smbPacket.smbHeader.SecurityFeatures;
this.smbHeader.Reserved = smbPacket.smbHeader.Reserved;
this.smbHeader.Tid = smbPacket.smbHeader.Tid;
this.smbHeader.PidLow = smbPacket.smbHeader.PidLow;
this.smbHeader.Uid = smbPacket.smbHeader.Uid;
this.smbHeader.Mid = smbPacket.smbHeader.Mid;
this.SmbParametersBlock = new SmbParameters();
this.smbParametersBlock.WordCount = smbPacket.smbParametersBlock.WordCount;
if (smbPacket.smbParametersBlock.Words != null)
{
this.smbParametersBlock.Words = new ushort[smbPacket.smbParametersBlock.Words.Length];
Array.Copy(smbPacket.smbParametersBlock.Words,
this.smbParametersBlock.Words,
smbPacket.smbParametersBlock.Words.Length);
}
else
{
this.smbParametersBlock.Words = new ushort[0];
}
this.SmbDataBlock = new SmbData();
this.smbDataBlock.ByteCount = smbPacket.smbDataBlock.ByteCount;
if (smbPacket.smbDataBlock.Bytes != null)
{
this.smbDataBlock.Bytes = new byte[smbPacket.smbDataBlock.Bytes.Length];
Array.Copy(smbPacket.smbDataBlock.Bytes,
this.smbDataBlock.Bytes,
smbPacket.smbDataBlock.Bytes.Length);
}
else
{
this.smbDataBlock.Bytes = new byte[0];
}
}
}
/// <summary>
/// Deep copy constructor.
/// </summary>
protected SmbBatchedRequestPacket(SmbBatchedRequestPacket packet)
: base(packet)
{
lock (packet)
{
if (packet.andxPacket != null)
{
this.andxPacket = packet.AndxPacket.Clone() as SmbPacket;
}
}
}
/// <summary>
/// this function will be invoked every time a packet is sent or received. all logics about
/// Client' states will be implemented here.
/// response packet update the context, do regular transaction.
/// </summary>
/// <param name="connection">the connection object.</param>
/// <param name="packet">the sent or received packet in stack transport.</param>
protected virtual void ResponsePacketUpdateRoleContextRegular(Connection connection, SmbPacket packet)
{
int connectionId = connection.ConnectionId;
#region RemoveOutstandingRequest
if (packet.SmbHeader.Status != 0
||!(packet is SmbTransactionInterimResponsePacket
|| packet is SmbTransaction2InterimResponsePacket
|| packet is SmbNtTransactInterimResponsePacket
|| packet is SmbWriteRawInterimResponsePacket))
{
this.RemoveOutstandingRequest(connectionId, (ulong)packet.SmbHeader.Mid);
}
#endregion
#region RemoveSequenceNumber
this.RemoveSequenceNumber(connectionId, packet);
#endregion
}
/// <summary>
/// remove the sequence number.
/// </summary>
/// <param name="response">the last response packet.</param>
/// <exception cref="System.InvalidOperationException">the msg should be response.</exception>
public void RemoveSequenceNumber(SmbPacket response)
{
this.serverSendSequenceNumbers.Remove(response.SmbHeader.Mid);
}
protected virtual void ResponsePacketUpdateRoleContext(
CifsClientPerConnection connection,
SmbPacket request,
SmbPacket response)
{
int connectionId = connection.ConnectionId;
if (request ==null | response == null)
{
return;
}
#region To update Connection/Session/Tree/Open with response
// Update context with success response:
if (response.SmbHeader.Status == 0)
{
CifsClientPerSession session = new CifsClientPerSession();
CifsClientPerTreeConnect tree = new CifsClientPerTreeConnect();
CifsClientPerOpenFile openFile = new CifsClientPerOpenFile();
CifsClientPerOpenSearch openSearch = new CifsClientPerOpenSearch();
switch (response.SmbHeader.Command)
{
#region connection
case SmbCommand.SMB_COM_NEGOTIATE:
#region SMB_COM_NEGOTIATE
SmbNegotiateRequestPacket negotiateRequest = request as SmbNegotiateRequestPacket;
SmbNegotiateResponsePacket negotiateResponse = response as SmbNegotiateResponsePacket;
if (negotiateRequest == null || negotiateResponse == null)
{
break;
}
// base class Connection:
connection.NegotiateReceived = true;
// common ADM:
int dialectIndex = (int)(negotiateResponse.SmbParameters.DialectIndex);
byte[] dialectBytes = negotiateRequest.SmbData.Dialects;
int startIndex = 0;
for (int i = 0; i < dialectIndex; i++)
{
startIndex = Array.IndexOf<byte>(dialectBytes, 0, startIndex,
dialectBytes.Length - startIndex) + 1;
}
connection.SelectedDialect = CifsMessageUtils.ToSmbString(dialectBytes, startIndex, true);
// client ADM:
connection.ShareLevelAccessControl = ((negotiateResponse.SmbParameters.SecurityMode
& SecurityModes.NEGOTIATE_ENCRYPT_PASSWORDS) == SecurityModes.NONE);
connection.ServerChallengeResponse = ((negotiateResponse.SmbParameters.SecurityMode
& SecurityModes.NEGOTIATE_ENCRYPT_PASSWORDS)
== SecurityModes.NEGOTIATE_ENCRYPT_PASSWORDS);
if (connection.ServerChallengeResponse
&& ((negotiateResponse.SmbParameters.SecurityMode
& SecurityModes.NEGOTIATE_SECURITY_SIGNATURES_ENABLED)
== SecurityModes.NEGOTIATE_SECURITY_SIGNATURES_ENABLED))
{
connection.ServerSigningState = SignStateValue.ENABLED;
}
if (connection.ServerSigningState == SignStateValue.ENABLED
&& ((negotiateResponse.SmbParameters.SecurityMode
& SecurityModes.NEGOTIATE_SECURITY_SIGNATURES_REQUIRED)
== SecurityModes.NEGOTIATE_SECURITY_SIGNATURES_REQUIRED))
{
connection.ServerSigningState = SignStateValue.REQUIRED;
}
connection.ServerCapabilities = negotiateResponse.SmbParameters.Capabilities;
connection.MaxBufferSize = negotiateResponse.SmbParameters.MaxBufferSize;
// negotiate response:
connection.SecurityMode = negotiateResponse.SmbParameters.SecurityMode;
connection.MaxMpxCount = negotiateResponse.SmbParameters.MaxMpxCount;
connection.MaxNumberVcs = negotiateResponse.SmbParameters.MaxNumberVcs;
connection.MaxRawSize = negotiateResponse.SmbParameters.MaxRawSize;
connection.SessionKey = negotiateResponse.SmbParameters.SessionKey;
connection.SystemTime = negotiateResponse.SmbParameters.SystemTime.Time;
connection.ServerTimeZone = negotiateResponse.SmbParameters.ServerTimeZone;
if (negotiateResponse.SmbData.Challenge != null
&& negotiateResponse.SmbData.Challenge.Length >= 8)
{
connection.Challenge =
BitConverter.ToUInt64(negotiateResponse.SmbData.Challenge, 0);
}
if (negotiateResponse.SmbData.DomainName != null)
{
connection.DomainName = new byte[negotiateResponse.SmbData.DomainName.Length];
Array.Copy(negotiateResponse.SmbData.DomainName, connection.DomainName,
negotiateResponse.SmbData.DomainName.Length);
}
// stack sdk design:
connection.ConnectionState = StackTransportState.ConnectionEstablished;
// update:
this.AddOrUpdateConnection(connection);
#endregion
break;
#endregion
#region session
case SmbCommand.SMB_COM_SESSION_SETUP_ANDX:
#region SMB_COM_SESSION_SETUP_ANDX
SmbSessionSetupAndxRequestPacket sessionSetupRequest =
request as SmbSessionSetupAndxRequestPacket;
SmbSessionSetupAndxResponsePacket sessionSetupResponse =
response as SmbSessionSetupAndxResponsePacket;
if (sessionSetupRequest == null || sessionSetupResponse == null)
{
break;
}
session.ConnectionId = connectionId;
session.SessionId = (ulong)sessionSetupResponse.SmbHeader.Uid;
// in request:
session.SessionKey = sessionSetupRequest.ImplicitNtlmSessionKey;
session.MaxBufferSize = sessionSetupRequest.SmbParameters.MaxBufferSize;
session.MaxMpxCount = sessionSetupRequest.SmbParameters.MaxMpxCount;
session.VcNumber = sessionSetupRequest.SmbParameters.VcNumber;
session.SessionKeyOfNegotiated = sessionSetupRequest.SmbParameters.SessionKey;
session.Capabilities = sessionSetupRequest.SmbParameters.Capabilities;
if ((sessionSetupRequest.SmbHeader.Flags2 & SmbFlags2.SMB_FLAGS2_UNICODE) ==
SmbFlags2.SMB_FLAGS2_UNICODE)
{
session.UserAccount = new CifsUserAccount(
Encoding.Unicode.GetString(sessionSetupRequest.SmbData.PrimaryDomain),
Encoding.Unicode.GetString(sessionSetupRequest.SmbData.AccountName),
Encoding.Unicode.GetString(sessionSetupRequest.SmbData.OEMPassword));
session.ClientNativeOs =
Encoding.Unicode.GetString(sessionSetupRequest.SmbData.NativeOS);
session.ClientNativeLanMan =
Encoding.Unicode.GetString(sessionSetupRequest.SmbData.NativeLanMan);
}
else
{
session.UserAccount = new CifsUserAccount(
Encoding.ASCII.GetString(sessionSetupRequest.SmbData.PrimaryDomain),
Encoding.ASCII.GetString(sessionSetupRequest.SmbData.AccountName),
Encoding.ASCII.GetString(sessionSetupRequest.SmbData.OEMPassword));
session.ClientNativeOs =
Encoding.ASCII.GetString(sessionSetupRequest.SmbData.NativeOS);
session.ClientNativeLanMan =
Encoding.ASCII.GetString(sessionSetupRequest.SmbData.NativeLanMan);
}
// in response:
session.Action = sessionSetupResponse.SmbParameters.Action;
if ((sessionSetupResponse.SmbHeader.Flags2 & SmbFlags2.SMB_FLAGS2_UNICODE) ==
SmbFlags2.SMB_FLAGS2_UNICODE)
{
session.ServerNativeOs =
Encoding.Unicode.GetString(sessionSetupResponse.SmbData.NativeOS);
session.ServerNativeLanMan =
Encoding.Unicode.GetString(sessionSetupResponse.SmbData.NativeLanMan);
session.ServerPrimaryDomain =
Encoding.Unicode.GetString(sessionSetupResponse.SmbData.PrimaryDomain);
}
else
{
session.ServerNativeOs =
Encoding.ASCII.GetString(sessionSetupResponse.SmbData.NativeOS);
session.ServerNativeLanMan =
Encoding.ASCII.GetString(sessionSetupResponse.SmbData.NativeLanMan);
session.ServerPrimaryDomain =
Encoding.ASCII.GetString(sessionSetupResponse.SmbData.PrimaryDomain);
}
if (connection.ShareLevelAccessControl == false)
{
connection.IsSigningActive = true;
connection.ConnectionSigningSessionKey = sessionSetupRequest.ImplicitNtlmSessionKey;
connection.ConnectionSigningChallengeResponse = sessionSetupRequest.SmbData.UnicodePassword;
AddOrUpdateConnection(connection);
}
// update:
this.AddOrUpdateSession(session);
#endregion
break;
case SmbCommand.SMB_COM_LOGOFF_ANDX:
#region SMB_COM_LOGOFF_ANDX
SmbLogoffAndxResponsePacket logoffResponse = response as SmbLogoffAndxResponsePacket;
if (logoffResponse == null)
{
break;
}
this.RemoveSession(connectionId, (ulong)logoffResponse.SmbHeader.Uid);
#endregion
break;
#endregion
#region treeconnect
case SmbCommand.SMB_COM_TREE_CONNECT:
#region SMB_COM_TREE_CONNECT
SmbTreeConnectRequestPacket treeConnectRequest =
request as SmbTreeConnectRequestPacket;
SmbTreeConnectResponsePacket treeConnectResponse =
response as SmbTreeConnectResponsePacket;
if (treeConnectRequest == null || treeConnectResponse == null)
{
break;
}
tree.ConnectionId = connectionId;
tree.SessionId = (ulong)treeConnectResponse.SmbHeader.Uid;
tree.TreeId = (ulong)treeConnectResponse.SmbHeader.Tid;
tree.ShareName = CifsMessageUtils.ToSmbString(treeConnectRequest.SmbData.Path, 0, false);
int index = tree.ShareName.LastIndexOf(@"\");
if (index > 0)
{
tree.Share = tree.ShareName.Substring(index + 1);
}
else
{
tree.Share = tree.ShareName;
}
this.AddOrUpdateTreeConnect(tree);
#endregion
break;
case SmbCommand.SMB_COM_TREE_CONNECT_ANDX:
#region SMB_COM_TREE_CONNECT_ANDX
SmbTreeConnectAndxRequestPacket treeConnectAndxRequest =
request as SmbTreeConnectAndxRequestPacket;
SmbTreeConnectAndxResponsePacket treeConnectAndxResponse =
response as SmbTreeConnectAndxResponsePacket;
if (treeConnectAndxRequest == null || treeConnectAndxResponse == null)
{
break;
}
tree.ConnectionId = connectionId;
tree.SessionId = (ulong)treeConnectAndxResponse.SmbHeader.Uid;
tree.TreeId = (ulong)treeConnectAndxResponse.SmbHeader.Tid;
if ((treeConnectAndxRequest.SmbHeader.Flags2 & SmbFlags2.SMB_FLAGS2_UNICODE) ==
SmbFlags2.SMB_FLAGS2_UNICODE)
{
tree.ShareName = Encoding.Unicode.GetString(treeConnectAndxRequest.SmbData.Path);
}
else
{
tree.ShareName = Encoding.ASCII.GetString(treeConnectAndxRequest.SmbData.Path);
}
int IndexOfShare = tree.ShareName.LastIndexOf(@"\");
if (IndexOfShare > 0)
{
tree.Share = tree.ShareName.Substring(IndexOfShare + 1);
}
else
{
tree.Share = tree.ShareName;
}
this.AddOrUpdateTreeConnect(tree);
#endregion
break;
case SmbCommand.SMB_COM_TREE_DISCONNECT:
#region SMB_COM_TREE_DISCONNECT
SmbTreeDisconnectResponsePacket treeDisconnectResponse =
response as SmbTreeDisconnectResponsePacket;
if (treeDisconnectResponse == null)
{
break;
}
this.RemoveTreeConnect(connectionId,
(ulong)treeDisconnectResponse.SmbHeader.Uid,
(ulong)treeDisconnectResponse.SmbHeader.Tid);
#endregion
break;
#endregion
#region openfile
case SmbCommand.SMB_COM_OPEN:
#region SMB_COM_OPEN
SmbOpenRequestPacket openRequest = request as SmbOpenRequestPacket;
SmbOpenResponsePacket openResponse = response as SmbOpenResponsePacket;
if (openRequest == null || openResponse == null)
{
break;
}
openFile.ConnectionId = connectionId;
openFile.SessionId = (ulong)openResponse.SmbHeader.Uid;
openFile.TreeConnectId = (ulong)openResponse.SmbHeader.Tid;
openFile.FileHandle = openResponse.SmbParameters.FID;
openFile.FileName = CifsMessageUtils.ToSmbString(openRequest.SmbData.FileName, 0, false);
this.AddOrUpdateOpenFile(openFile);
#endregion
break;
case SmbCommand.SMB_COM_CREATE:
#region SMB_COM_CREATE
SmbCreateRequestPacket createRequest = request as SmbCreateRequestPacket;
SmbCreateResponsePacket createResponse = response as SmbCreateResponsePacket;
if (createRequest == null || createResponse == null)
{
break;
}
openFile.ConnectionId = connectionId;
openFile.SessionId = (ulong)createResponse.SmbHeader.Uid;
openFile.TreeConnectId = (ulong)createResponse.SmbHeader.Tid;
openFile.FileHandle = createResponse.SmbParameters.FID;
openFile.FileName = CifsMessageUtils.ToSmbString(createRequest.SmbData.FileName, 0, false);
this.AddOrUpdateOpenFile(openFile);
#endregion
break;
case SmbCommand.SMB_COM_CREATE_TEMPORARY:
#region SMB_COM_CREATE_TEMPORARY
SmbCreateTemporaryRequestPacket createTemporaryRequest =
request as SmbCreateTemporaryRequestPacket;
SmbCreateTemporaryResponsePacket createTemporaryResponse =
response as SmbCreateTemporaryResponsePacket;
if (createTemporaryRequest == null || createTemporaryResponse == null)
{
break;
}
openFile.ConnectionId = connectionId;
openFile.SessionId = (ulong)createTemporaryResponse.SmbHeader.Uid;
openFile.TreeConnectId = (ulong)createTemporaryResponse.SmbHeader.Tid;
openFile.FileHandle = createTemporaryResponse.SmbParameters.FID;
openFile.FileName = CifsMessageUtils.ToSmbString(
createTemporaryResponse.SmbData.TemporaryFileName, 0, false);
this.AddOrUpdateOpenFile(openFile);
#endregion
break;
case SmbCommand.SMB_COM_CREATE_NEW:
#region SMB_COM_CREATE_NEW
SmbCreateNewRequestPacket createNewRequest = request as SmbCreateNewRequestPacket;
SmbCreateNewResponsePacket createNewResponse = response as SmbCreateNewResponsePacket;
if (createNewRequest == null || createNewResponse == null)
{
break;
}
openFile.ConnectionId = connectionId;
openFile.SessionId = (ulong)createNewResponse.SmbHeader.Uid;
openFile.TreeConnectId = (ulong)createNewResponse.SmbHeader.Tid;
openFile.FileHandle = createNewResponse.SmbParameters.FID;
openFile.FileName = CifsMessageUtils.ToSmbString(createNewRequest.SmbData.FileName, 0, false);
this.AddOrUpdateOpenFile(openFile);
#endregion
break;
case SmbCommand.SMB_COM_OPEN_ANDX:
#region SMB_COM_OPEN_ANDX
SmbOpenAndxRequestPacket openAndxRequest = request as SmbOpenAndxRequestPacket;
SmbOpenAndxResponsePacket openAndxResponse = response as SmbOpenAndxResponsePacket;
if (openAndxRequest == null || openAndxResponse == null)
{
break;
}
openFile.ConnectionId = connectionId;
openFile.SessionId = (ulong)openAndxResponse.SmbHeader.Uid;
openFile.TreeConnectId = (ulong)openAndxResponse.SmbHeader.Tid;
openFile.FileHandle = openAndxResponse.SmbParameters.FID;
if ((openAndxRequest.SmbHeader.Flags2 & SmbFlags2.SMB_FLAGS2_UNICODE) ==
SmbFlags2.SMB_FLAGS2_UNICODE)
{
openFile.FileName = Encoding.Unicode.GetString(openAndxRequest.SmbData.FileName);
}
else
{
openFile.FileName = Encoding.ASCII.GetString(openAndxRequest.SmbData.FileName);
}
this.AddOrUpdateOpenFile(openFile);
#endregion
//save FID for chained response like:
//treeConnect->openAndx->readAndx->close
//when "close", FID is need to close the open opened in openAndx.
if (openAndxResponse.AndxPacket != null)
{
//borrow smbHeader.Protocol to save FID for later process.
//smbHeader.Protocol also use a flag to differentiate a single packet from a
//batched andx packet.
//FID is ushort, impossible to impact smbHeader.Protocol's usage as
//a real packet header 0x424D53FF(0xFF, 'S', 'M', 'B')
SmbHeader andxHeader = openAndxResponse.AndxPacket.SmbHeader;
andxHeader.Protocol = openAndxResponse.SmbParameters.FID;
openAndxResponse.AndxPacket.SmbHeader = andxHeader;
}
break;
case SmbCommand.SMB_COM_NT_CREATE_ANDX:
#region SMB_COM_NT_CREATE_ANDX
SmbNtCreateAndxRequestPacket ntCreateAndxRequest =
request as SmbNtCreateAndxRequestPacket;
SmbNtCreateAndxResponsePacket ntCreateAndxResponse =
response as SmbNtCreateAndxResponsePacket;
if (ntCreateAndxRequest == null || ntCreateAndxResponse == null)
{
break;
}
openFile.ConnectionId = connectionId;
openFile.SessionId = (ulong)ntCreateAndxResponse.SmbHeader.Uid;
openFile.TreeConnectId = (ulong)ntCreateAndxResponse.SmbHeader.Tid;
openFile.FileHandle = ntCreateAndxResponse.SmbParameters.FID;
if ((ntCreateAndxRequest.SmbHeader.Flags2 & SmbFlags2.SMB_FLAGS2_UNICODE) ==
SmbFlags2.SMB_FLAGS2_UNICODE)
{
openFile.FileName = Encoding.Unicode.GetString(ntCreateAndxRequest.SmbData.FileName);
}
else
{
openFile.FileName = Encoding.ASCII.GetString(ntCreateAndxRequest.SmbData.FileName);
}
this.AddOrUpdateOpenFile(openFile);
#endregion
break;
case SmbCommand.SMB_COM_OPEN_PRINT_FILE:
#region SMB_COM_OPEN_PRINT_FILE
SmbOpenPrintFileRequestPacket openPrintFileRequest =
request as SmbOpenPrintFileRequestPacket;
SmbOpenPrintFileResponsePacket openPrintFileResponse =
response as SmbOpenPrintFileResponsePacket;
if (openPrintFileRequest == null || openPrintFileResponse == null)
{
break;
}
openFile.ConnectionId = connectionId;
openFile.SessionId = (ulong)openPrintFileResponse.SmbHeader.Uid;
openFile.TreeConnectId = (ulong)openPrintFileResponse.SmbHeader.Tid;
openFile.FileHandle = openPrintFileResponse.SmbParameters.FID;
openFile.FileName = CifsMessageUtils.ToSmbString(
openPrintFileRequest.SmbData.Identifier, 0, false);
this.AddOrUpdateOpenFile(openFile);
#endregion
break;
case SmbCommand.SMB_COM_TRANSACTION2:
#region Trans2Open2
SmbTrans2Open2RequestPacket trans2Open2Request =
request as SmbTrans2Open2RequestPacket;
SmbTrans2Open2FinalResponsePacket trans2Open2Response =
response as SmbTrans2Open2FinalResponsePacket;
if (trans2Open2Request != null && trans2Open2Response != null)
{
openFile.ConnectionId = connectionId;
openFile.SessionId = (ulong)trans2Open2Response.SmbHeader.Uid;
openFile.TreeConnectId = (ulong)trans2Open2Response.SmbHeader.Tid;
openFile.FileHandle = trans2Open2Response.Trans2Parameters.Fid;
if ((trans2Open2Request.SmbHeader.Flags2 & SmbFlags2.SMB_FLAGS2_UNICODE) ==
SmbFlags2.SMB_FLAGS2_UNICODE)
{
openFile.FileName = Encoding.Unicode.GetString(
trans2Open2Request.Trans2Parameters.FileName);
}
else
{
openFile.FileName = Encoding.ASCII.GetString(
trans2Open2Request.Trans2Parameters.FileName);
}
this.AddOrUpdateOpenFile(openFile);
break;
}
#endregion
#region Trans2FindFirst2
SmbTrans2FindFirst2RequestPacket trans2FindFirst2Request =
request as SmbTrans2FindFirst2RequestPacket;
SmbTrans2FindFirst2FinalResponsePacket trans2FindFirst2Response =
response as SmbTrans2FindFirst2FinalResponsePacket;
if (trans2FindFirst2Request != null && trans2FindFirst2Response != null)
{
openSearch.ConnectionId = connectionId;
openSearch.SessionId = (ulong)trans2FindFirst2Response.SmbHeader.Uid;
openSearch.TreeConnectId = (ulong)trans2FindFirst2Response.SmbHeader.Tid;
openSearch.SearchID = trans2FindFirst2Response.Trans2Parameters.SID;
if ((trans2FindFirst2Request.SmbHeader.Flags2 & SmbFlags2.SMB_FLAGS2_UNICODE) ==
SmbFlags2.SMB_FLAGS2_UNICODE)
{
openSearch.SearchName = Encoding.Unicode.GetString(
trans2FindFirst2Request.Trans2Parameters.FileName);
}
else
{
openSearch.SearchName = Encoding.ASCII.GetString(
trans2FindFirst2Request.Trans2Parameters.FileName);
}
this.AddOrUpdateOpenSearch(openSearch);
break;
}
#endregion
break;
case SmbCommand.SMB_COM_WRITE_AND_CLOSE:
#region SMB_COM_WRITE_AND_CLOSE
SmbWriteAndCloseRequestPacket writeAndCloseRequest =
request as SmbWriteAndCloseRequestPacket;
if (writeAndCloseRequest == null)
{
break;
}
this.RemoveOpenFile(connectionId, (ulong)response.SmbHeader.Uid,
(ulong)response.SmbHeader.Tid, writeAndCloseRequest.SmbParameters.FID);
#endregion
break;
case SmbCommand.SMB_COM_CLOSE:
#region SMB_COM_CLOSE
// Get FID from CLOSE request.
// If fail, then get FID from the Batched Request.
// If still fail, then Get FID from the Batched Response.
ushort closeFId = 0;
SmbCloseRequestPacket closeRequest = request as SmbCloseRequestPacket;
if (closeRequest != null)
{
//Neither SMB_PROTOCOL_IDENTIFIER, or SMB_PROTOCOL_ANDXPACKET, then must be a FID
if (response.SmbHeader.Protocol != CifsMessageUtils.SMB_PROTOCOL_IDENTIFIER
&& response.SmbHeader.Protocol != CifsMessageUtils.SMB_PROTOCOL_ANDXPACKET)
{
closeFId = (ushort)response.SmbHeader.Protocol;
}
else
{
closeFId = closeRequest.SmbParameters.FID;
}
this.RemoveOpenFile(connectionId, (ulong)response.SmbHeader.Uid,
(ulong)response.SmbHeader.Tid, closeFId);
}
#endregion
break;
#endregion
#region opensearch
case SmbCommand.SMB_COM_FIND_CLOSE2:
#region SMB_COM_FIND_CLOSE2
SmbFindClose2RequestPacket findClose2Request =
request as SmbFindClose2RequestPacket;
if (findClose2Request == null)
{
break;
}
this.RemoveOpenSearch(connectionId, (ulong)response.SmbHeader.Uid,
(ulong)response.SmbHeader.Tid, findClose2Request.SmbParameters.SearchHandle);
#endregion
break;
#endregion
default:
// No Connection/Session/Tree/Open will be updated if other types of response.
break;
}
SmbBatchedRequestPacket smbBatchedRequest = request as SmbBatchedRequestPacket;
SmbBatchedResponsePacket smbBatchedResponse = response as SmbBatchedResponsePacket;
if (smbBatchedRequest != null && smbBatchedResponse != null)
{
//pass the FID stored in the andxHeader.Protocol into response.AndxPacket
if (smbBatchedRequest.AndxPacket != null && smbBatchedResponse.AndxPacket != null
&& response.SmbHeader.Protocol != CifsMessageUtils.SMB_PROTOCOL_ANDXPACKET
&& response.SmbHeader.Protocol != CifsMessageUtils.SMB_PROTOCOL_IDENTIFIER)
{
SmbHeader andxHeader = smbBatchedResponse.AndxPacket.SmbHeader;
andxHeader.Protocol = smbBatchedResponse.SmbHeader.Protocol;
smbBatchedResponse.AndxPacket.SmbHeader = andxHeader;
}
this.ResponsePacketUpdateRoleContext(connection, smbBatchedRequest.AndxPacket,
smbBatchedResponse.AndxPacket);
}
}
#endregion
}
/// <summary>
/// to read the andx packet from the channel
/// </summary>
/// <param name="channel">the channel started with the SmbParameters of the andx.</param>
/// <returns>the size in bytes of the SmbParameters, SmbData and andx if existed of the andx.</returns>
internal int ReadAndxFromChannel(Channel channel)
{
int consumedLen = 0;
if (this.AndxCommand != SmbCommand.SMB_COM_NO_ANDX_COMMAND)
{
SmbHeader andxHeader = this.SmbHeader;
andxHeader.Protocol = CifsMessageUtils.SMB_PROTOCOL_ANDXPACKET;
andxHeader.Command = this.AndxCommand;
this.andxPacket = CifsMessageUtils.CreateSmbRequestPacket(andxHeader, channel);
this.andxPacket.SmbHeader = andxHeader;
consumedLen += this.andxPacket.ReadParametersFromChannel(channel);
consumedLen += this.andxPacket.ReadDataFromChannel(channel);
SmbBatchedRequestPacket batchedRequest = this.andxPacket as SmbBatchedRequestPacket;
if (batchedRequest != null)
{
consumedLen += batchedRequest.ReadAndxFromChannel(channel);
}
}
return consumedLen;
}
/// <summary>
/// to decode stack packet from the received message bytes.
/// the message bytes contains data without transport information
/// </summary>
/// <param name = "connection">the connection from which the message bytes are received. </param>
/// <param name = "packetBytesWithoutTransport">the received message bytes to be decoded. </param>
/// <param name = "consumedLength">the length of message bytes consumed by decoder. </param>
/// <param name = "expectedLength">the length of message bytes the decoder expects to receive. </param>
/// <returns>the stack packets decoded from the received message bytes. </returns>
/// <exception cref="InvalidOperationException">
/// thrown when packet security signature is invalid.
/// </exception>
private SmbPacket[] DecodePacketFromBytesWithoutTransport(
SmbServerConnection connection, byte[] packetBytesWithoutTransport,
out int consumedLength, out int expectedLength)
{
expectedLength = 0;
consumedLength = 0;
SmbPacket[] packets = new SmbPacket[0];
int packetConsumedLength = 0;
int packetExpectedLength = 0;
// decode packets using cifs decorder.
SmbPacket request = this.DecodeSmbRequestFromBytes(
packetBytesWithoutTransport, out packetConsumedLength);
// valid the signature
if (request != null && request.SmbHeader.SecurityFeatures != 0
&& connection.GssApi != null && connection.GssApi.SessionKey != null)
{
byte[] bytesToValid = ArrayUtility.SubArray(packetBytesWithoutTransport, 0);
// the signature offset is 14.
byte[] zeroSignature = new byte[sizeof(ulong)];
Array.Copy(zeroSignature, 0, bytesToValid, 14, zeroSignature.Length);
// the signature offset is 14.
zeroSignature = BitConverter.GetBytes((ulong)connection.ServerNextReceiveSequenceNumber);
Array.Copy(zeroSignature, 0, bytesToValid, 14, zeroSignature.Length);
byte[] signature = CifsMessageUtils.CreateSignature(bytesToValid, connection.GssApi.SessionKey);
if (request.SmbHeader.SecurityFeatures != BitConverter.ToUInt64(signature, 0))
{
throw new InvalidOperationException("packet security signature is invalid");
}
}
// Use the decoded packet to UpdateRoleContext if it is not null and ContextUpdate is enabled:
if (request != null)
{
if (this.context.IsUpdateContext)
{
this.context.UpdateRoleContext(connection, request);
}
packets = new SmbPacket[] { request };
}
// update the length after decode packet.
consumedLength += packetConsumedLength;
expectedLength += packetExpectedLength;
return packets;
}
/// <summary>
/// update the sequence number of a connection.
/// </summary>
/// <param name="connectionId">the connection identity.</param>
/// <param name="msg">the last request packet.</param>
private void UpdateSequenceNumber(int connectionId, SmbPacket msg)
{
lock (this.contextCollection)
{
for (int i = this.contextCollection.ConnectionList.Count - 1; i >= 0; i--)
{
if (this.contextCollection.ConnectionList[i].ConnectionId == connectionId)
{
(this.contextCollection.ConnectionList[i] as
CifsClientPerConnection).UpdateSequenceNumber(msg);
return;
}
}
}
}
/// <summary>
/// add request packet to the request list
/// </summary>
/// <param name="request">the request packet</param>
internal void AddRequestPacket(SmbPacket request)
{
lock (this.requestList)
{
this.requestList[request.SmbHeader.Mid] = request;
}
}
/// <summary>
/// create the nt transaction packet
/// </summary>
/// <param name="request">the request packet</param>
/// <param name="smbHeader">the smb header of response packet</param>
/// <param name="channel">the channel contains the packet bytes</param>
/// <returns>the response packet</returns>
private SmbPacket CreateNtTransactionResponsePacket(SmbPacket request, SmbHeader smbHeader, Channel channel)
{
SmbPacket smbPacket = null;
if (smbHeader.Status == 0 && channel.Peek<byte>(0) == 0 && channel.Peek<ushort>(1) == 0)
{
return smbPacket;
}
SmbNtTransactRequestPacket ntTransactRequest = request as SmbNtTransactRequestPacket;
if (ntTransactRequest == null)
{
return smbPacket;
}
// find regular packet
switch ((uint)ntTransactRequest.SmbParameters.Function)
{
case (uint)NtTransSubCommand.NT_TRANSACT_RENAME:
smbPacket = new SmbNtTransRenameResponsePacket();
break;
case (uint)NtTransSubCommand.NT_TRANSACT_CREATE:
smbPacket = new SmbNtTransactCreateResponsePacket();
break;
case (uint)NtTransSubCommand.NT_TRANSACT_IOCTL:
NT_TRANSACT_IOCTL_SETUP setup =
CifsMessageUtils.ToStuct<NT_TRANSACT_IOCTL_SETUP>(
CifsMessageUtils.ToBytesArray<ushort>(ntTransactRequest.SmbParameters.Setup));
switch ((NtTransFunctionCode)setup.FunctionCode)
{
case NtTransFunctionCode.FSCTL_SRV_ENUMERATE_SNAPSHOTS:
smbPacket = new SmbNtTransFsctlSrvEnumerateSnapshotsResponsePacket();
break;
case NtTransFunctionCode.FSCTL_SRV_REQUEST_RESUME_KEY:
smbPacket = new SmbNtTransFsctlSrvRequestResumeKeyResponsePacket();
break;
case NtTransFunctionCode.FSCTL_SRV_COPYCHUNK:
smbPacket = new SmbNtTransFsctlSrvCopyChunkResponsePacket();
break;
default:
smbPacket = new SmbNtTransactIoctlResponsePacket();
break;
}
break;
case (uint)SmbNtTransSubCommand.NT_TRANSACT_QUERY_QUOTA:
smbPacket = new SmbNtTransQueryQuotaResponsePacket();
break;
case (uint)SmbNtTransSubCommand.NT_TRANSACT_SET_QUOTA:
smbPacket = new SmbNtTransSetQuotaResponsePacket();
break;
default:
break;
}
return smbPacket;
}
private SmbPacket CreateTransaction2ResponsePacket(SmbPacket request, SmbHeader smbHeader, Channel channel)
{
SmbPacket smbPacket = null;
if (smbHeader.Status == 0 && channel.Peek<byte>(0) == 0 && channel.Peek<ushort>(1) == 0)
{
return smbPacket;
}
SmbTransaction2RequestPacket transaction2Request = request as SmbTransaction2RequestPacket;
if (transaction2Request == null)
{
return smbPacket;
}
// if no setup command. break
if (transaction2Request.SmbParameters.SetupCount == 0)
{
return smbPacket;
}
// decode packet using the setup command
switch ((Trans2SubCommand)transaction2Request.SmbParameters.Setup[0])
{
case Trans2SubCommand.TRANS2_QUERY_FILE_INFORMATION:
SmbTrans2QueryFileInformationRequestPacket queryFileRequest =
transaction2Request as SmbTrans2QueryFileInformationRequestPacket;
if (queryFileRequest != null)
{
smbPacket = new SmbTrans2QueryFileInformationResponsePacket(
queryFileRequest.Trans2Parameters.InformationLevel);
}
break;
case Trans2SubCommand.TRANS2_QUERY_PATH_INFORMATION:
SmbTrans2QueryPathInformationRequestPacket queryPathRequest =
transaction2Request as SmbTrans2QueryPathInformationRequestPacket;
if (queryPathRequest != null)
{
smbPacket = new SmbTrans2QueryPathInformationResponsePacket(
queryPathRequest.Trans2Parameters.InformationLevel);
}
break;
case Trans2SubCommand.TRANS2_SET_FILE_INFORMATION:
smbPacket = new SmbTrans2SetFileInformationResponsePacket();
break;
case Trans2SubCommand.TRANS2_SET_PATH_INFORMATION:
smbPacket = new SmbTrans2SetPathInformationResponsePacket();
break;
case Trans2SubCommand.TRANS2_QUERY_FS_INFORMATION:
SmbTrans2QueryFsInformationRequestPacket queryFsRequest =
transaction2Request as SmbTrans2QueryFsInformationRequestPacket;
if (queryFsRequest != null)
{
smbPacket = new SmbTrans2QueryFsInformationResponsePacket(
queryFsRequest.Trans2Parameters.InformationLevel);
}
break;
case Trans2SubCommand.TRANS2_SET_FS_INFORMATION:
smbPacket = new SmbTrans2SetFsInformationResponsePacket();
break;
case Trans2SubCommand.TRANS2_FIND_FIRST2:
SmbTrans2FindFirst2RequestPacket first2Request =
transaction2Request as SmbTrans2FindFirst2RequestPacket;
if (first2Request != null)
{
smbPacket = new SmbTrans2FindFirst2ResponsePacket(first2Request.Trans2Parameters.InformationLevel,
(first2Request.Trans2Parameters.Flags & Trans2FindFlags.SMB_FIND_RETURN_RESUME_KEYS)
== Trans2FindFlags.SMB_FIND_RETURN_RESUME_KEYS);
}
break;
case Trans2SubCommand.TRANS2_FIND_NEXT2:
SmbTrans2FindNext2RequestPacket next2Request =
transaction2Request as SmbTrans2FindNext2RequestPacket;
if (next2Request != null)
{
smbPacket = new SmbTrans2FindNext2ResponsePacket(next2Request.Trans2Parameters.InformationLevel,
(next2Request.Trans2Parameters.Flags & Trans2FindFlags.SMB_FIND_RETURN_RESUME_KEYS)
== Trans2FindFlags.SMB_FIND_RETURN_RESUME_KEYS);
}
break;
case Trans2SubCommand.TRANS2_GET_DFS_REFERRAL:
smbPacket = new SmbTrans2GetDfsReferralResponsePacket();
break;
default:
break;
}
return smbPacket;
}
protected override SmbPacket CreateSmbResponsePacket(
SmbPacket request,
SmbHeader smbHeader,
Channel channel)
{
SmbPacket smbPacket = null;
// error packet
SmbStatus packetStatus = (SmbStatus)smbHeader.Status;
// error packet
if (packetStatus != SmbStatus.STATUS_SUCCESS &&
packetStatus != SmbStatus.STATUS_MORE_PROCESSING_REQUIRED &&
packetStatus != SmbStatus.STATUS_BUFFER_OVERFLOW)
{
smbPacket = new SmbErrorResponsePacket();
smbPacket.SmbHeader = smbHeader;
return smbPacket;
}
// success packet
switch (smbHeader.Command)
{
case SmbCommand.SMB_COM_NEGOTIATE:
if (smbClient.Capability.IsSupportsExtendedSecurity)
{
smbPacket = new SmbNegotiateResponsePacket();
}
else
{
smbPacket = new SmbNegotiateImplicitNtlmResponsePacket();
}
break;
case SmbCommand.SMB_COM_SESSION_SETUP_ANDX:
if (smbClient.Capability.IsSupportsExtendedSecurity)
{
smbPacket = new SmbSessionSetupAndxResponsePacket();
}
else
{
smbPacket = new SmbSessionSetupImplicitNtlmAndxResponsePacket();
}
break;
case SmbCommand.SMB_COM_TREE_CONNECT_ANDX:
smbPacket = new SmbTreeConnectAndxResponsePacket();
break;
case SmbCommand.SMB_COM_TREE_DISCONNECT:
smbPacket = new SmbTreeDisconnectResponsePacket();
break;
case SmbCommand.SMB_COM_LOGOFF_ANDX:
smbPacket = new SmbLogoffAndxResponsePacket();
break;
case SmbCommand.SMB_COM_NT_CREATE_ANDX:
smbPacket = new SmbNtCreateAndxResponsePacket();
break;
case SmbCommand.SMB_COM_CLOSE:
smbPacket = new SmbCloseResponsePacket();
break;
case SmbCommand.SMB_COM_OPEN_ANDX:
smbPacket = new SmbOpenAndxResponsePacket();
break;
case SmbCommand.SMB_COM_WRITE_ANDX:
smbPacket = new SmbWriteAndxResponsePacket();
break;
case SmbCommand.SMB_COM_READ_ANDX:
smbPacket = new SmbReadAndxResponsePacket();
break;
case SmbCommand.SMB_COM_TRANSACTION:
smbPacket = this.CreateTransactionResponsePacket(request, smbHeader, channel);
break;
case SmbCommand.SMB_COM_TRANSACTION2:
smbPacket = this.CreateTransaction2ResponsePacket(request, smbHeader, channel);
break;
case SmbCommand.SMB_COM_NT_TRANSACT:
smbPacket = this.CreateNtTransactionResponsePacket(request, smbHeader, channel);
break;
default:
break;
}
if (smbPacket != null)
{
smbPacket.SmbHeader = smbHeader;
return smbPacket;
}
return base.CreateSmbResponsePacket(request, smbHeader, channel);
}
/// <summary>
/// decode the batched request packet
/// </summary>
/// <param name="channel">the channel of bytes to read</param>
/// <param name="request">the request of the response.</param>
/// <param name="smbBatchedResponse">the batched response</param>
/// <returns>the consumed length of batched response packet</returns>
protected override int DecodeBatchedRequest(
Channel channel,
SmbPacket request, SmbBatchedResponsePacket smbBatchedResponse)
{
int result = base.DecodeBatchedRequest(channel, request, smbBatchedResponse);
for (SmbBatchedResponsePacket currentPacket = smbBatchedResponse;
currentPacket != null && currentPacket.AndxPacket != null;
currentPacket = currentPacket.AndxPacket as SmbBatchedResponsePacket)
{
SmbPacket andxPacket = currentPacket.AndxPacket;
// create the smb packet
object smbParameters = ObjectUtility.GetFieldValue(currentPacket, "smbParameters");
if (smbParameters != null)
{
SmbHeader smbHeader = smbBatchedResponse.SmbHeader;
smbHeader.Command = (SmbCommand)ObjectUtility.GetFieldValue(smbParameters, "AndXCommand");
andxPacket = CreateSmbResponsePacket(null, smbHeader, null);
}
// convert from cifs packet to smb packet
if (andxPacket != null)
{
Type smbPacketType = andxPacket.GetType();
andxPacket = ObjectUtility.CreateInstance(
smbPacketType.Module.FullyQualifiedName,
smbPacketType.FullName,
new object[] { currentPacket.AndxPacket }) as SmbPacket;
}
currentPacket.AndxPacket = andxPacket;
}
return result;
}
/// <summary>
/// add a request into the table of OutstandingRequests.
/// </summary>
/// <param name="packet">the Outstanding Request.</param>
/// <returns>false:the packet is not REQUEST or it is Cancel packet or the MessageId already exists in the table.
/// otherwise true.</returns>
internal bool AddOutstandingRequest(SmbPacket packet)
{
ulong mid = (ulong)(packet.SmbHeader.Mid);
lock (this.RequestList)
{
if (this.RequestList.ContainsKey(mid))
{
return false;
}
else
{
this.RequestList.Add(mid, packet);
return true;
}
}
}
/// <summary>
/// update the sequence number.
/// </summary>
/// <param name="msg">the last request packet.</param>
/// <exception cref="System.InvalidOperationException">the msg should be request.</exception>
public void UpdateSequenceNumber(SmbPacket msg)
{
// only request can be used to UpdateSequenceNumber:
if (msg.PacketType != SmbPacketType.SingleRequest
&& msg.PacketType != SmbPacketType.BatchedRequest)
{
throw new InvalidOperationException("the packet used to UpdateSequenceNumber should be request.");
}
// if the message is not signed, return.
if (!msg.IsSignRequired)
{
return;
}
// update client sequence number
if (msg.SmbHeader.Command == SmbCommand.SMB_COM_NT_CANCEL)
{
this.ClientNextSendSequenceNumber++;
}
else
{
this.clientResponseSequenceNumberList[msg.SmbHeader.Mid] = this.ClientNextSendSequenceNumber + 1;
this.ClientNextSendSequenceNumber += 2;
}
}
/// <summary>
/// remove the sequence number.
/// </summary>
/// <param name="msg">the last response packet.</param>
/// <exception cref="System.InvalidOperationException">the msg should be response.</exception>
public void RemoveSequenceNumber(SmbPacket msg)
{
// only response can be used to RemoveSequenceNumber:
if (msg.PacketType != SmbPacketType.SingleResponse
&& msg.PacketType != SmbPacketType.BatchedResponse)
{
throw new InvalidOperationException("the packet used to RemoveSequenceNumber should be response.");
}
if (this.ClientResponseSequenceNumberList.ContainsKey(msg.SmbHeader.Mid))
{
this.ClientResponseSequenceNumberList.Remove(msg.SmbHeader.Mid);
}
}
protected virtual void UpdateRoleContext(CifsClientPerConnection connection, SmbPacket packet)
{
// request packet:
if ((packet.PacketType == SmbPacketType.BatchedRequest
|| packet.PacketType == SmbPacketType.SingleRequest)
// Skip over the OpLock Break Notification request sent from server.
&& packet.SmbHeader.Protocol != CifsMessageUtils.SMB_PROTOCOL_IDENTIFIER_ASYNC
&& packet.SmbHeader.Mid != CifsMessageUtils.INVALID_MID)
{
RequestPacketUpdateRoleContext(connection, packet, false);
}
// response packet:
else if (packet.PacketType == SmbPacketType.BatchedResponse
|| packet.PacketType == SmbPacketType.SingleResponse)
{
SmbPacket request = this.GetOutstandingRequest(connection.ConnectionId, (ulong)packet.SmbHeader.Mid);
ResponsePacketUpdateRoleContext(connection, request, packet);
if (connection.IsSigningActive && packet.IsSignRequired)
{
packet.IsSignatureCorrect = CifsMessageUtils.VerifySignature(
packet,
connection.ConnectionSigningSessionKey,
(uint)connection.ClientResponseSequenceNumberList[packet.SmbHeader.Mid],
connection.ConnectionSigningChallengeResponse);
}
ResponsePacketUpdateRoleContextRegular(connection, packet);
}
else
{
// Do nothing if neither request nor response.
// No exception is thrown here because UpdateRoleContext is not responsible for checking the
// invalidation of the packet.
}
}
/// <summary>
/// createt the transactions packet
/// </summary>
/// <param name="request">the request packet</param>
/// <param name="smbHeader">the smb header of response packet</param>
/// <param name="channel">the channel contains the packet bytes</param>
/// <returns>the response packet</returns>
private SmbPacket CreateTransactionResponsePacket(SmbPacket request, SmbHeader smbHeader, Channel channel)
{
SmbPacket smbPacket = null;
if (smbHeader.Status == 0 && channel.Peek<byte>(0) == 0 && channel.Peek<ushort>(1) == 0)
{
return smbPacket;
}
SmbTransactionRequestPacket transactionRequest = request as SmbTransactionRequestPacket;
if (transactionRequest == null)
{
return smbPacket;
}
switch (smbClient.Capability.TransactionSubCommand)
{
case TransSubCommandExtended.TRANS_EXT_MAILSLOT_WRITE:
smbPacket = new SmbTransMailslotWriteResponsePacket();
break;
case TransSubCommandExtended.TRANS_EXT_RAP:
smbPacket = new SmbTransRapResponsePacket();
break;
default:
break;
}
// the packet is find
if (smbPacket != null)
{
return smbPacket;
}
// if no setup command. break
if (transactionRequest.SmbParameters.SetupCount == 0)
{
return smbPacket;
}
// decode packet using the setup command
switch ((TransSubCommand)transactionRequest.SmbParameters.Setup[0])
{
case TransSubCommand.TRANS_SET_NMPIPE_STATE:
smbPacket = new SmbTransSetNmpipeStateResponsePacket();
break;
case TransSubCommand.TRANS_QUERY_NMPIPE_STATE:
smbPacket = new SmbTransQueryNmpipeStateResponsePacket();
break;
case TransSubCommand.TRANS_RAW_READ_NMPIPE:
smbPacket = new SmbTransRawReadNmpipeResponsePacket();
break;
case TransSubCommand.TRANS_QUERY_NMPIPE_INFO:
smbPacket = new SmbTransQueryNmpipeInfoResponsePacket();
break;
case TransSubCommand.TRANS_PEEK_NMPIPE:
smbPacket = new SmbTransPeekNmpipeResponsePacket();
break;
case TransSubCommand.TRANS_TRANSACT_NMPIPE:
smbPacket = new SmbTransTransactNmpipeResponsePacket();
break;
case TransSubCommand.TRANS_READ_NMPIPE:
smbPacket = new SmbTransReadNmpipeResponsePacket();
break;
case TransSubCommand.TRANS_WRITE_NMPIPE:
smbPacket = new SmbTransWriteNmpipeResponsePacket();
break;
case TransSubCommand.TRANS_WAIT_NMPIPE:
smbPacket = new SmbTransWaitNmpipeResponsePacket();
break;
case TransSubCommand.TRANS_CALL_NMPIPE:
smbPacket = new SmbTransCallNmpipeResponsePacket();
break;
default:
break;
}
return smbPacket;
}
/// <summary>
/// add a request into the table of OutstandingRequests.
/// </summary>
/// <param name="connectionId">the connection identity.</param>
/// <param name="packet">the Outstanding Request.</param>
public void AddOutstandingRequest(int connectionId, SmbPacket packet)
{
if (packet == null)
{
return;
}
lock (this.contextCollection)
{
for (int i = this.contextCollection.ConnectionList.Count - 1; i >= 0; i--)
{
if (this.contextCollection.ConnectionList[i].ConnectionId == connectionId)
{
(this.contextCollection.ConnectionList[i] as
CifsClientPerConnection).AddOutstandingRequest(packet);
return;
}
}
}
}
/// <summary>
/// this function will be invoked every time a packet is sent or received. all logics about
/// Client' states will be implemented here.
/// </summary>
/// <param name="connection">the connection object.</param>
/// <param name="packet">the sent or received packet in stack transport.</param>
protected override void UpdateRoleContext(CifsClientPerConnection connection, SmbPacket packet)
{
// Do nothing if no connection is found or the packet is not SmbPacket:
if (connection == null || packet == null)
{
return;
}
// request packet:
if (packet.PacketType == SmbPacketType.BatchedRequest
|| packet.PacketType == SmbPacketType.SingleRequest)
{
RequestPacketUpdateRoleContext(connection, packet, false);
}
// response packet:
else if (packet.PacketType == SmbPacketType.BatchedResponse
|| packet.PacketType == SmbPacketType.SingleResponse)
{
if (!this.SmbUpdateContextWithResponsePacket(connection as SmbClientConnection, packet))
{
SmbPacket request = this.GetOutstandingRequest(connection.ConnectionId, (ulong)packet.SmbHeader.Mid);
ResponsePacketUpdateRoleContext(connection, request, packet);
}
ResponsePacketUpdateRoleContextRegular(connection, packet);
}
else
{
// Do nothing if neither request nor response.
// No exception is thrown here because UpdateRoleContext is not responsible for checking the
// invalidation of the packet.
}
}
/// <summary>
/// Send packet to a specific connected client
/// </summary>
/// <param name="connection">connection to remote client</param>
/// <param name="packet">the smb packet</param>
/// <exception cref="ArgumentNullException">smbPacket</exception>
/// <exception cref="ArgumentNullException">endpoint</exception>
/// <exception cref="InvalidOperationException">
/// The transport is null for not started. Please invoke Start() first
/// </exception>
public virtual void SendPacket(SmbPacket packet, SmbServerConnection connection)
{
if (packet == null)
{
throw new ArgumentNullException("packet");
}
if (connection == null)
{
throw new ArgumentNullException("connection");
}
if (this.transport == null)
{
throw new InvalidOperationException(
"The transport is null for not started. Please invoke Start() first.");
}
SmbPacket smbPacket = packet as SmbPacket;
if (smbPacket != null && this.context.IsUpdateContext)
{
this.context.UpdateRoleContext(connection, smbPacket);
}
switch(this.transportType)
{
case TransportType.TCP:
// send packet through the direct tcp
this.transport.SendPacket(connection.Identity, new SmbDirectTcpPacket(packet));
break;
case TransportType.NetBIOS:
// send packet through netbios over Tcp
this.transport.SendPacket(connection.Identity, smbPacket);
break;
default:
break;
}
}
/// <summary>
/// Send raw frame, which has been customized by upper layer modules.
/// </summary>
/// <param name = "smbPacket">SmbPacket is the base class of all the SM2 packets. </param>
/// <exception cref="ArgumentNullException">smbPacket</exception>
/// <exception cref="InvalidOperationException">
/// The transport is null for not connected to server. Please invoke Connect() first.
/// </exception>
public virtual void SendPacket(SmbPacket smbPacket)
{
if (smbPacket == null)
{
throw new ArgumentNullException("smbPacket");
}
if (this.transport == null)
{
throw new InvalidOperationException(
"The transport is null for not connected to server. Please invoke Connect() first.");
}
if (this.cifsClient.IsContextUpdateEnabled)
{
this.cifsClient.Context.UpdateRoleContext(this.ConnectionId, smbPacket);
}
switch (this.capability.TransportType)
{
case TransportType.TCP:
// send packet through the direct tcp
this.transport.SendPacket(new SmbDirectTcpPacket(smbPacket));
break;
case TransportType.NetBIOS:
// send packet through netbios over Tcp
this.transport.SendPacket(smbPacket);
break;
default:
break;
}
}
/// <summary>
/// remove the request packet according to the response packet
/// </summary>
/// <param name="response">the response packet</param>
internal void RemoveRequestPacket(SmbPacket response)
{
lock (this.requestList)
{
if (this.requestList.ContainsKey(response.SmbHeader.Mid))
{
this.requestList.Remove(response.SmbHeader.Mid);
}
}
}
/// <summary>
/// update the context with request packet
/// </summary>
/// <param name="connection">the connection of endpoint</param>
/// <param name="packet">the packet to update the context</param>
private void RequestPacketUpdateRoleContext(SmbServerConnection connection, SmbPacket packet)
{
connection.AddRequestPacket(packet);
// update the message id
connection.MessageId = packet.SmbHeader.Mid;
// update the process id
connection.ProcessId = (uint)(packet.SmbHeader.PidHigh << 16);
connection.ProcessId += packet.SmbHeader.PidLow;
// update the message sign sequence number
if (packet.SmbHeader.SecurityFeatures != 0
&& connection.GssApi != null && connection.GssApi.SessionKey != null)
{
if (packet.SmbHeader.Command == SmbCommand.SMB_COM_NT_CANCEL)
{
connection.ServerNextReceiveSequenceNumber++;
}
else
{
ServerSendSequenceNumberKey key = new ServerSendSequenceNumberKey();
key.PidHigh = packet.SmbHeader.PidHigh;
key.PidLow = packet.SmbHeader.PidLow;
key.Mid = packet.SmbHeader.Mid;
connection.ServerSendSequenceNumber[key] = connection.ServerNextReceiveSequenceNumber + 1;
connection.ServerNextReceiveSequenceNumber += 2;
}
}
// process each special command
switch (packet.SmbHeader.Command)
{
case SmbCommand.SMB_COM_NEGOTIATE:
SmbNegotiateRequestPacket request = packet as SmbNegotiateRequestPacket;
byte[] dialects = request.SmbData.Dialects;
List<string> negotiateDialects = new List<string>();
for (int i = 0; i < dialects.Length; i++)
{
if (dialects[i] == 0x02)
{
continue;
}
string dialect = "";
for (; i < dialects.Length && dialects[i] != 0x00; i++)
{
dialect += (char)dialects[i];
}
negotiateDialects.Add(dialect);
}
connection.NegotiatedDialects = negotiateDialects.ToArray();
break;
case SmbCommand.SMB_COM_TREE_CONNECT_ANDX:
// down-case the packet
Cifs.SmbTreeConnectAndxRequestPacket treeconnect = packet as Cifs.SmbTreeConnectAndxRequestPacket;
// get the specified session.
SmbServerSession treeconnectSession = connection.GetSession((ushort)treeconnect.SmbHeader.Uid);
if (treeconnectSession == null)
{
return;
}
// Calculate the one-way hash
byte[] sessionKey = FileServiceUtils.ProtectSessionKey(treeconnectSession.SessionKey);
// update the session key state.
treeconnectSession.SessionKeyState = SessionKeyStateValue.Available;
// if server does not support SMB_EXTENDED_SIGNATURES, return.
if (SmbClientTreeConnect.TreeConnectAndxExtendedSignatures !=
(treeconnect.SmbParameters.Flags & SmbClientTreeConnect.TreeConnectAndxExtendedSignatures))
{
return;
}
treeconnectSession.SessionKey = sessionKey;
break;
default:
return;
}
return;
}
/// <summary>
/// to decode stack packet from the received message bytes.
/// the message bytes contains data without transport information
/// </summary>
/// <param name = "endpoint">the endpoint from which the message bytes are received. </param>
/// <param name = "packetBytesWithoutTransport">the received message bytes to be decoded. </param>
/// <param name = "consumedLength">the length of message bytes consumed by decoder. </param>
/// <param name = "expectedLength">the length of message bytes the decoder expects to receive. </param>
/// <returns>the stack packets decoded from the received message bytes. </returns>
private SmbPacket[] DecodePacketFromBytesWithoutTransport(
int endpoint, byte[] packetBytesWithoutTransport, out int consumedLength, out int expectedLength)
{
expectedLength = 0;
consumedLength = 0;
SmbPacket[] packets = new SmbPacket[0];
int packetConsumedLength = 0;
int packetExpectedLength = 0;
// decode packets using cifs decorder.
SmbPacket response = this.DecodeSmbResponseFromBytes(
(int)endpoint, packetBytesWithoutTransport, out packetConsumedLength);
// Use the decoded packet to UpdateRoleContext if it is not null and ContextUpdate is enabled:
if (response != null)
{
if (this.IsContextUpdateEnabled)
{
this.clientContext.UpdateRoleContext((int)endpoint, response);
}
packets = new SmbPacket[] { response };
}
// update the length after decode packet.
consumedLength += packetConsumedLength;
expectedLength += packetExpectedLength;
return packets;
}
/// <summary>
/// decode packet from bytes
/// </summary>
/// <param name="connectId">the connection identity.</param>
/// <param name="messageBytes">bytes contains packet</param>
/// <param name="consumedLength">the bytes length which are consumed when decode.</param>
/// <returns>the decoded packet from the bytes array. if failed, return null.</returns>
protected SmbPacket DecodeSmbResponseFromBytes(
int connectId,
byte[] messageBytes,
out int consumedLength)
{
consumedLength = 0;
SmbPacket smbRequest = null;
SmbPacket smbResponse = null;
using (MemoryStream memoryStream = new MemoryStream(messageBytes, true))
{
using (Channel channel = new Channel(null, memoryStream))
{
// read raw response:
Collection <SmbPacket> outstandingRequests = this.clientContext.GetOutstandingRequests(connectId);
if (outstandingRequests != null && outstandingRequests.Count > 0)
{
SmbReadRawRequestPacket readRawRequest = outstandingRequests[0] as SmbReadRawRequestPacket;
if (readRawRequest != null)
{
SmbReadRawResponsePacket readRawResponse = this.CreateSmbResponsePacket(
readRawRequest, readRawRequest.SmbHeader, channel) as SmbReadRawResponsePacket;
if (readRawResponse != null)
{
byte[] rawData = new byte[messageBytes.Length];
Array.Copy(messageBytes, rawData, rawData.Length);
readRawResponse.RawData = rawData;
consumedLength = rawData.Length;
return(readRawResponse);
}
else
{
// discard the none-parsable data silently:
consumedLength = messageBytes.Length;
return(null);
}
}
else
{
// No SmbReadRawResponsePacket sent, so the response should not be SmbReadRawResponsePacket.
// and do nothing here.
}
}
// read smb header and new SmbPacket:
if (channel.Stream.Position < channel.Stream.Length &&
messageBytes.Length >= CifsMessageUtils.GetSize <SmbHeader>(new SmbHeader()))
{
SmbHeader smbHeader = channel.Read <SmbHeader>();
smbRequest = this.clientContext.GetOutstandingRequest(connectId, smbHeader.Mid);
smbResponse = this.CreateSmbResponsePacket(smbRequest, smbHeader, channel);
consumedLength += smbResponse.HeaderSize;
}
else
{
// The data in the channel is less than the size of SmbHeader. consume nothing and return null:
consumedLength = 0;
return(null);
}
// read SmbParameters:
consumedLength += smbResponse.ReadParametersFromChannel(channel);
// read SmbData:
consumedLength += smbResponse.ReadDataFromChannel(channel);
// read andx:
SmbBatchedResponsePacket smbBatchedResponse = smbResponse as SmbBatchedResponsePacket;
if (smbRequest != null && smbBatchedResponse != null)
{
consumedLength += DecodeBatchedRequest(channel, smbRequest, smbBatchedResponse);
}
// handle the difference of protocol implementation:
SmbWriteAndCloseResponsePacket writeAndCloseResponse = smbResponse as SmbWriteAndCloseResponsePacket;
if (writeAndCloseResponse != null)
{
if (this.clientConfig.IsWriteAndCloseResponseExtraPadding)
{
// Windows NT Server appends three NULL bytes to this message, following the ByteCount field.
// These three bytes are not message data and can safely be discarded.
const int PaddingLength = 3;
writeAndCloseResponse.PaddingBytes = channel.ReadBytes(PaddingLength);
consumedLength += PaddingLength;
}
}
}
}
return(smbResponse);
}
private bool SmbUpdateContextWithResponsePacket(SmbClientConnection connection, SmbPacket response)
{
if (response == null)
{
return false;
}
int connectionId = connection.ConnectionId;
SmbHeader smbHeader = response.SmbHeader;
// only process the response packet.
if (response.PacketType != SmbPacketType.BatchedResponse
&& response.PacketType != SmbPacketType.SingleResponse)
{
return false;
}
// packet status
SmbStatus packetStatus = (SmbStatus)smbHeader.Status;
// filter error packet
if (packetStatus != SmbStatus.STATUS_SUCCESS &&
packetStatus != SmbStatus.STATUS_MORE_PROCESSING_REQUIRED &&
packetStatus != SmbStatus.STATUS_BUFFER_OVERFLOW)
{
return false;
}
// process each special command
switch (smbHeader.Command)
{
#region Negotiate Response
case SmbCommand.SMB_COM_NEGOTIATE:
// implicit ntlm, decode using cifs sdk.
if (!smbClient.Capability.IsSupportsExtendedSecurity)
{
return false;
}
// down cast to negotiate response packet.
SmbNegotiateResponsePacket negotiate = response as SmbNegotiateResponsePacket;
// set negotiate flag
connection.NegotiateSent = true;
#region update security mode
SecurityModes securityModes = negotiate.SmbParameters.SecurityMode;
if (SecurityModes.NEGOTIATE_SECURITY_SIGNATURES_ENABLED
== (securityModes & SecurityModes.NEGOTIATE_SECURITY_SIGNATURES_ENABLED))
{
connection.ServerSigningState = SignState.ENABLED;
}
else if (SecurityModes.NEGOTIATE_SECURITY_SIGNATURES_REQUIRED
== (securityModes & SecurityModes.NEGOTIATE_SECURITY_SIGNATURES_REQUIRED))
{
connection.ServerSigningState = SignState.REQUIRED;
}
else
{
connection.ServerSigningState = SignState.DISABLED;
}
if (SecurityModes.NEGOTIATE_USER_SECURITY
== (securityModes & SecurityModes.NEGOTIATE_USER_SECURITY))
{
connection.UsesSharePasswords = false;
}
else
{
connection.UsesSharePasswords = true;
}
if (SecurityModes.NEGOTIATE_ENCRYPT_PASSWORDS
== (securityModes & SecurityModes.NEGOTIATE_ENCRYPT_PASSWORDS))
{
connection.IsClientEncryptPasswords = true;
}
else
{
connection.IsClientEncryptPasswords = false;
}
// update IsSignActive using the combination of the client's
// MessageSigningPolicy and the connection's ServerSigningState
smbClient.Context.UpdateSigningActive(connection);
#endregion
#region update server capabilities
connection.ServerCapabilities = (Capabilities)negotiate.SmbParameters.Capabilities;
if (Capabilities.CAP_INFOLEVEL_PASSTHRU
== (connection.ServerCapabilities & Capabilities.CAP_INFOLEVEL_PASSTHRU))
{
smbClient.Capability.IsUsePathThrough = true;
}
#endregion
#region update maxbuffersize
connection.MaxBufferSize = negotiate.SmbParameters.MaxBufferSize;
#endregion
this.AddOrUpdateConnection(connection);
break;
#endregion
#region Session Setup Response
case SmbCommand.SMB_COM_SESSION_SETUP_ANDX:
// implicit ntlm, decode using cifs sdk.
if (!smbClient.Capability.IsSupportsExtendedSecurity)
{
return false;
}
// the session to operation on.
SmbClientSession session = null;
// down-case the packet
SmbSessionSetupAndxResponsePacket packet = response as SmbSessionSetupAndxResponsePacket;
// if session exists, use it.
if (this.GetSession(connectionId, smbHeader.Uid) != null)
{
session = new SmbClientSession(this.GetSession(connectionId, smbHeader.Uid));
}
else
{
session = new SmbClientSession();
}
// if success, update context and session key.
if (packetStatus == SmbStatus.STATUS_SUCCESS)
{
// if spng, the SessionKey is null and the SecurityBlob from server contains data
// in this situation, need to initialize the SecurityBlob of server to generate the SessionKey
if (connection.GssApi.SessionKey == null
&& packet.SecurityBlob != null && packet.SecurityBlob.Length > 0)
{
connection.GssApi.Initialize(packet.SecurityBlob);
}
// get session key and store in the context
session.SessionKey = connection.GssApi.SessionKey;
// reset the gss api of connection
connection.GssApi = null;
// reset the securityblob when success
packet.SecurityBlob = null;
}
// update the security blob from server
connection.SecurityBlob = packet.SecurityBlob;
this.AddOrUpdateConnection(connection);
// update session
session.SessionUid = smbHeader.Uid;
session.ConnectionId = connectionId;
this.AddOrUpdateSession(session);
break;
#endregion
default:
return false;
}
return true;
}
/// <summary>
/// Expect a request. If user is not interested in the packet, please call DefaultSendResponse().
/// </summary>
/// <param name="timeout">timeout</param>
/// <param name="connection">the connection between server and client</param>
/// <param name="session">the session between server and client</param>
/// <param name="treeConnect">the tree connect between server and client</param>
/// <param name="open">the file open between server and client</param>
/// <param name="requestPacket">the request</param>
public override void ExpectRequest(
TimeSpan timeout,
out IFileServiceServerConnection connection,
out IFileServiceServerSession session,
out IFileServiceServerTreeConnect treeConnect,
out IFileServiceServerOpen open,
out SmbFamilyPacket requestPacket)
{
CifsServerPerConnection cifsConnection;
SmbPacket request = this.cifsServer.ExpectPacket(timeout, out cifsConnection);
connection = cifsConnection;
requestPacket = request;
session = null;
treeConnect = null;
open = null;
if (request != null)
{
session = cifsConnection.GetSession(request.SmbHeader.Uid);
if (session != null)
{
treeConnect = (session as CifsServerPerSession).GetTreeConnect(request.SmbHeader.Tid);
if (treeConnect != null)
{
ushort fid = 0;
SmbTransactionRequestPacket transactionRequest = request as SmbTransactionRequestPacket;
SmbNtTransactIoctlRequestPacket ioctlRequest = request as SmbNtTransactIoctlRequestPacket;
SmbNtTransactNotifyChangeRequestPacket notifyChange = request as SmbNtTransactNotifyChangeRequestPacket;
if (transactionRequest != null)
{
//SubCommand(2bytes), FID(2bytes)
fid = transactionRequest.SmbParameters.Setup[1];
}
else if (ioctlRequest != null)
{
//FunctionCode(4bytes), FID(2bytes), IsFctl(1bytes), IsFlags(1bytes)
fid = ioctlRequest.SmbParameters.Setup[2];
}
else if (notifyChange != null)
{
//CompletionFilter(4bytes), FID(2bytes), WatchTree(1bytes), Reserved(1bytes)
fid = notifyChange.SmbParameters.Setup[2];
}
else
{
Type packetType = request.GetType();
PropertyInfo pi = packetType.GetProperty(
"Trans2Parameters", BindingFlags.Instance | BindingFlags.Public);
if (pi == null)
{
pi = packetType.GetProperty(
"NtTransParameters", BindingFlags.Instance | BindingFlags.Public);
}
if (pi == null)
{
pi = packetType.GetProperty(
"SmbParameters", BindingFlags.Instance | BindingFlags.Public);
}
if (pi != null)
{
object smbParameters = pi.GetValue(request, null);
FieldInfo fi = smbParameters.GetType().GetField(
"FID",
BindingFlags.Instance | BindingFlags.Public | BindingFlags.IgnoreCase);
if (fi != null)
{
fid = (ushort)fi.GetValue(smbParameters);
}
}
}
if (fid > 0)
{
open = (treeConnect as CifsServerPerTreeConnect).GetOpen(fid);
}
}
}
}
}
/// <summary>
/// update the context of smb server
/// </summary>
/// <param name="connection">the connection of the client</param>
/// <param name="packet">the packet to update the context</param>
internal void UpdateRoleContext(SmbServerConnection connection, SmbPacket packet)
{
if (connection == null)
{
return;
}
// packet status
SmbStatus packetStatus = (SmbStatus)packet.SmbHeader.Status;
// filter error packet
if (packetStatus != SmbStatus.STATUS_SUCCESS &&
packetStatus != SmbStatus.STATUS_MORE_PROCESSING_REQUIRED &&
packetStatus != SmbStatus.STATUS_BUFFER_OVERFLOW)
{
return;
}
// process the response packet.
if (packet.PacketType == SmbPacketType.BatchedResponse
|| packet.PacketType == SmbPacketType.SingleResponse)
{
ResponsePacketUpdateRoleContext(connection, packet);
return;
}
// process the request packet.
if (packet.PacketType == SmbPacketType.BatchedRequest
|| packet.PacketType == SmbPacketType.SingleRequest)
{
RequestPacketUpdateRoleContext(connection, packet);
return;
}
}
/// <summary>
/// the transport
/// </summary>
/// <param name = "packet">the packet to send through TCP </param>
public SmbDirectTcpPacket(SmbPacket packet)
{
this.packet = packet;
}
/// <summary>
/// update the context with response packet
/// </summary>
/// <param name="connection">the connection of endpoint</param>
/// <param name="packet">the packet to update the context</param>
private void ResponsePacketUpdateRoleContext(SmbServerConnection connection, SmbPacket packet)
{
SmbHeader smbHeader = packet.SmbHeader;
SmbPacket requestPacket = connection.GetRequestPacket(smbHeader.Mid);
if (requestPacket == null)
{
return;
}
switch (smbHeader.Command)
{
case SmbCommand.SMB_COM_SESSION_SETUP_ANDX:
if (smbHeader.Uid == 0)
{
break;
}
else
{
SmbServerSession session = new SmbServerSession();
session.Uid = smbHeader.Uid;
session.AuthenticationState = SessionState.Complete;
session.Connection = connection;
session.SessionKey = connection.GssApi.SessionKey;
connection.AddSession(session);
}
break;
case SmbCommand.SMB_COM_LOGOFF_ANDX:
if (requestPacket.SmbHeader.Uid == 0)
{
break;
}
else
{
connection.RemoveSession(connection.GetSession(requestPacket.SmbHeader.Uid));
}
break;
case SmbCommand.SMB_COM_TREE_CONNECT_ANDX:
{
SmbTreeConnectAndxRequestPacket request = requestPacket as SmbTreeConnectAndxRequestPacket;
SmbServerTreeConnect treeconnect = new SmbServerTreeConnect();
treeconnect.TreeId = smbHeader.Tid;
treeconnect.Session = connection.GetSession(smbHeader.Uid);
if (treeconnect.Session == null)
{
break;
}
if ((request.SmbHeader.Flags2 & SmbFlags2.SMB_FLAGS2_UNICODE) != 0)
{
treeconnect.Path = Encoding.Unicode.GetString(request.SmbData.Path);
}
else
{
treeconnect.Path = Encoding.ASCII.GetString(request.SmbData.Path);
}
treeconnect.Path = treeconnect.Path.TrimEnd('\0');
treeconnect.Session.AddTreeConnect(treeconnect);
}
break;
case SmbCommand.SMB_COM_TREE_DISCONNECT:
if (requestPacket.SmbHeader.Uid != 0)
{
SmbServerSession session = connection.GetSession(requestPacket.SmbHeader.Uid);
if (session == null)
{
break;
}
session.RemoveTreeConnect(session.GetTreeConnect(requestPacket.SmbHeader.Tid));
}
break;
case SmbCommand.SMB_COM_NT_CREATE_ANDX:
{
SmbNtCreateAndxResponsePacket response = packet as SmbNtCreateAndxResponsePacket;
SmbNtCreateAndxRequestPacket request = requestPacket as SmbNtCreateAndxRequestPacket;
SmbServerOpen open = new SmbServerOpen();
open.SmbFid = response.SmbParameters.FID;
open.PathName = SmbMessageUtils.GetString(request.SmbData.FileName,
SmbFlags2.SMB_FLAGS2_UNICODE == (request.SmbHeader.Flags2 & SmbFlags2.SMB_FLAGS2_UNICODE));
open.PathName = open.PathName.TrimEnd('\0');
open.Session = connection.GetSession(smbHeader.Uid);
open.TreeConnect = connection.GetTreeConnect(smbHeader.Tid);
if (open.TreeConnect == null)
{
break;
}
open.TreeConnect.AddOpen(open);
}
break;
case SmbCommand.SMB_COM_OPEN_ANDX:
{
SmbOpenAndxResponsePacket response = packet as SmbOpenAndxResponsePacket;
SmbOpenAndxRequestPacket request = requestPacket as SmbOpenAndxRequestPacket;
SmbServerOpen open = new SmbServerOpen();
open.SmbFid = response.SmbParameters.FID;
open.PathName = SmbMessageUtils.GetString(request.SmbData.FileName,
SmbFlags2.SMB_FLAGS2_UNICODE == (request.SmbHeader.Flags2 & SmbFlags2.SMB_FLAGS2_UNICODE));
open.Session = connection.GetSession(smbHeader.Uid);
open.TreeConnect = connection.GetTreeConnect(smbHeader.Tid);
if (open.TreeConnect == null)
{
break;
}
open.TreeConnect.AddOpen(open);
}
break;
case SmbCommand.SMB_COM_CLOSE:
{
SmbCloseRequestPacket closeRequest = requestPacket as SmbCloseRequestPacket;
SmbServerTreeConnect treeconnect = connection.GetTreeConnect(requestPacket.SmbHeader.Tid);
if (treeconnect == null)
{
break;
}
treeconnect.RemoveOpen(treeconnect.GetOpen(closeRequest.SmbParameters.FID));
}
break;
default:
break;
}
connection.RemoveRequestPacket(packet);
}
/// <summary>
/// this function will be invoked every time a packet is sent or received. all logics about
/// Client' states will be implemented here.
/// request packet update the context
/// </summary>
/// <param name="connection">the connection object.</param>
/// <param name="packet">the sent or received packet in stack transport.</param>
/// <param name="isAndxPacket">the packet is andx packet or not.</param>
protected virtual void RequestPacketUpdateRoleContext(CifsClientPerConnection connection, SmbPacket packet, bool isAndxPacket)
{
int connectionId = connection.ConnectionId;
if (packet == null)
{
return;
}
#region To update Connection/Session/Tree/Open with request
switch (packet.SmbHeader.Command)
{
case SmbCommand.SMB_COM_NEGOTIATE:
connection.NegotiateSent = true;
this.AddOrUpdateConnection(connection);
break;
default:
// No Connection/Session/Tree/Open will be updated for other requests.
break;
}
#endregion
#region AddOutstandingRequest
if (!isAndxPacket
&& packet.SmbHeader.Command != SmbCommand.SMB_COM_TRANSACTION_SECONDARY
&& packet.SmbHeader.Command != SmbCommand.SMB_COM_TRANSACTION2_SECONDARY
&& packet.SmbHeader.Command != SmbCommand.SMB_COM_NT_TRANSACT_SECONDARY
&& packet.SmbHeader.Command != SmbCommand.SMB_COM_NT_CANCEL)
{
this.AddOutstandingRequest(connectionId, packet);
}
else
{
// do nothing for requests of Andx, SECONDARY and CANCEL.
}
#endregion
#region UpdateSequenceNumber
if (!isAndxPacket)
{
this.UpdateSequenceNumber(connectionId, packet);
}
SmbBatchedRequestPacket batchedPacket = packet as SmbBatchedRequestPacket;
if (batchedPacket != null)
{
RequestPacketUpdateRoleContext(connection, batchedPacket.AndxPacket, true);
}
#endregion
}
