/**
* Unpack a string from the byte area
*
* @param uni boolean
* @return String
*/
public final String unpackString(boolean uni) {
// Check for Unicode or ASCII
String ret = null;
if (uni) {
// Word align the current buffer position
m_pos = DataPacker.wordAlign(m_pos);
ret = DataPacker.getUnicodeString(m_smbbuf, m_pos, m_smbbuf.length - m_pos);
if (ret != null) m_pos += (ret.length() * 2) + 2;
} else {
// Unpack the ASCII string
ret = DataPacker.getString(m_smbbuf, m_pos, m_smbbuf.length - m_pos);
if (ret != null) m_pos += ret.length() + 1;
}
// Return the string
return ret;
}
/**
* Process an NT create andX request
*
* @param sess SMBSrvSession
* @param smbPkt SMBSrvPacket
* @exception IOException
* @exception SMBSrvException
*/
protected static void procNTCreateAndX(SMBSrvSession sess, SMBSrvPacket smbPkt)
throws IOException, SMBSrvException {
// Get the tree id from the received packet and validate that it is a valid
// connection id.
TreeConnection conn = sess.findTreeConnection(smbPkt);
if (conn == null) {
sess.sendErrorResponseSMB(smbPkt, SMBStatus.NTInvalidParameter, SMBStatus.NTErr);
return;
}
// Extract the NT create andX parameters
NTParameterPacker prms = new NTParameterPacker(smbPkt.getBuffer(), SMBSrvPacket.PARAMWORDS + 5);
int nameLen = prms.unpackWord();
int flags = prms.unpackInt();
int rootFID = prms.unpackInt();
int accessMask = prms.unpackInt();
long allocSize = prms.unpackLong();
int attrib = prms.unpackInt();
int shrAccess = prms.unpackInt();
int createDisp = prms.unpackInt();
int createOptn = prms.unpackInt();
int impersonLev = prms.unpackInt();
int secFlags = prms.unpackByte();
// Extract the filename string
int pos = DataPacker.wordAlign(smbPkt.getByteOffset());
String fileName = DataPacker.getUnicodeString(smbPkt.getBuffer(), pos, nameLen);
if (fileName == null) {
sess.sendErrorResponseSMB(smbPkt, SMBStatus.NTInvalidParameter, SMBStatus.NTErr);
return;
}
// Debug
if (Debug.EnableInfo && sess.hasDebug(SMBSrvSession.DBG_IPC))
sess.debugPrintln(
"NT Create AndX ["
+ smbPkt.getTreeId()
+ "] name="
+ fileName
+ ", flags=0x"
+ Integer.toHexString(flags)
+ ", attr=0x"
+ Integer.toHexString(attrib)
+ ", allocSize="
+ allocSize);
// Check if the pipe name is a short or long name
if (fileName.startsWith("\\PIPE") == false) fileName = "\\PIPE" + fileName;
// Check if the requested IPC$ file is valid
int pipeType = DCEPipeType.getNameAsType(fileName);
if (pipeType == -1) {
sess.sendErrorResponseSMB(smbPkt, SMBStatus.NTObjectNotFound, SMBStatus.NTErr);
return;
}
// Check if there is a handler for the pipe file
if (DCEPipeHandler.getHandlerForType(pipeType) == null) {
sess.sendErrorResponseSMB(smbPkt, SMBStatus.NTAccessDenied, SMBStatus.NTErr);
return;
}
// Create a network file for the special pipe
DCEPipeFile pipeFile = new DCEPipeFile(pipeType);
pipeFile.setGrantedAccess(NetworkFile.READWRITE);
// Add the file to the list of open files for this tree connection
int fid = -1;
try {
fid = conn.addFile(pipeFile, sess);
} catch (TooManyFilesException ex) {
// Too many files are open on this connection, cannot open any more files.
sess.sendErrorResponseSMB(smbPkt, SMBStatus.Win32InvalidHandle, SMBStatus.NTErr);
return;
}
// Build the NT create andX response
boolean extendedResponse = (flags & WinNT.ExtendedResponse) != 0;
smbPkt.setParameterCount(extendedResponse ? 42 : 34);
prms.reset(smbPkt.getBuffer(), SMBSrvPacket.PARAMWORDS + 4);
prms.packByte(0);
prms.packWord(fid);
prms.packInt(0x0001); // File existed and was opened
prms.packLong(0); // Creation time
prms.packLong(0); // Last access time
prms.packLong(0); // Last write time
prms.packLong(0); // Change time
prms.packInt(0x0080); // File attributes
prms.packLong(4096); // Allocation size
prms.packLong(0); // End of file
prms.packWord(2); // File type - named pipe, message mode
prms.packByte(0xFF); // Pipe instancing count
prms.packByte(0x05); // IPC state bits
prms.packByte(0); // directory flag
// Pack the extra extended response area, if requested
if (extendedResponse == true) {
// 22 byte block of zeroes
prms.packLong(0);
prms.packLong(0);
prms.packInt(0);
prms.packWord(0);
// Pack the permissions
prms.packInt(0x1F01FF);
// 6 byte block of zeroes
prms.packInt(0);
prms.packWord(0);
}
smbPkt.setByteCount(0);
smbPkt.setAndXCommand(0xFF);
smbPkt.setParameter(1, smbPkt.getLength()); // AndX offset
// Send the response packet
sess.sendResponseSMB(smbPkt);
}