jcifs.dcerpc.ndr.NdrBuffer Maven / Gradle / Ivy
Go to download
Show more of this group Show more artifacts with this name
Show all versions of jcifs Show documentation
Show all versions of jcifs Show documentation
JCIFS is an Open Source client library that implements the CIFS/SMB networking protocol in 100% Java
The newest version!
/* jcifs msrpc client library in Java
* Copyright (C) 2006 "Michael B. Allen"
* "Eric Glass"
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
package jcifs.dcerpc.ndr;
import java.io.UnsupportedEncodingException;
import java.util.HashMap;
import jcifs.util.Encdec;
public class NdrBuffer {
int referent;
HashMap referents;
static class Entry {
int referent;
Object obj;
}
public byte[] buf;
public int start;
public int index;
public int length;
public NdrBuffer deferred;
public NdrBuffer(byte[] buf, int start) {
this.buf = buf;
this.start = index = start;
length = 0;
deferred = this;
}
public NdrBuffer derive(int idx) {
NdrBuffer nb = new NdrBuffer(buf, start);
nb.index = idx;
nb.deferred = deferred;
return nb;
}
public void reset() {
this.index = start;
length = 0;
deferred = this;
}
public int getIndex() {
return index;
}
public void setIndex(int index) {
this.index = index;
}
public int getCapacity() {
return buf.length - start;
}
public int getTailSpace() {
return buf.length - index;
}
public byte[] getBuffer() {
return buf;
}
public int align(int boundary, byte value) {
int n = align(boundary);
int i = n;
while (i > 0) {
buf[index - i] = value;
i--;
}
return n;
}
public void writeOctetArray(byte[] b, int i, int l) {
System.arraycopy(b, i, buf, index, l);
advance(l);
}
public void readOctetArray(byte[] b, int i, int l) {
System.arraycopy(buf, index, b, i, l);
advance(l);
}
public int getLength() {
return deferred.length;
}
public void setLength(int length) {
deferred.length = length;
}
public void advance(int n) {
index += n;
if ((index - start) > deferred.length) {
deferred.length = index - start;
}
}
public int align(int boundary) {
int m = boundary - 1;
int i = index - start;
int n = ((i + m) & ~m) - i;
advance(n);
return n;
}
public void enc_ndr_small(int s) {
buf[index] = (byte)(s & 0xFF);
advance(1);
}
public int dec_ndr_small() {
int val = buf[index] & 0xFF;
advance(1);
return val;
}
public void enc_ndr_short(int s) {
align(2);
Encdec.enc_uint16le((short)s, buf, index);
advance(2);
}
public int dec_ndr_short() {
align(2);
int val = Encdec.dec_uint16le(buf, index);
advance(2);
return val;
}
public void enc_ndr_long(int l) {
align(4);
Encdec.enc_uint32le(l, buf, index);
advance(4);
}
public int dec_ndr_long() {
align(4);
int val = Encdec.dec_uint32le(buf, index);
advance(4);
return val;
}
public void enc_ndr_hyper(long h) {
align(8);
Encdec.enc_uint64le(h, buf, index);
advance(8);
}
public long dec_ndr_hyper() {
align(8);
long val = Encdec.dec_uint64le(buf, index);
advance(8);
return val;
}
/* float */
/* double */
public void enc_ndr_string(String s) {
align(4);
int i = index;
int len = s.length();
Encdec.enc_uint32le(len + 1, buf, i); i += 4;
Encdec.enc_uint32le(0, buf, i); i += 4;
Encdec.enc_uint32le(len + 1, buf, i); i += 4;
try {
System.arraycopy(s.getBytes("UTF-16LE"), 0, buf, i, len * 2);
} catch( UnsupportedEncodingException uee ) {
}
i += len * 2;
buf[i++] = (byte)'\0';
buf[i++] = (byte)'\0';
advance(i - index);
}
public String dec_ndr_string() throws NdrException {
align(4);
int i = index;
String val = null;
int len = Encdec.dec_uint32le(buf, i);
i += 12;
if (len != 0) {
len--;
int size = len * 2;
try {
if (size < 0 || size > 0xFFFF) throw new NdrException( NdrException.INVALID_CONFORMANCE );
val = new String(buf, i, size, "UTF-16LE");
i += size + 2;
} catch( UnsupportedEncodingException uee ) {
}
}
advance(i - index);
return val;
}
private int getDceReferent(Object obj) {
Entry e;
if (referents == null) {
referents = new HashMap();
referent = 1;
}
if ((e = (Entry)referents.get(obj)) == null) {
e = new Entry();
e.referent = referent++;
e.obj = obj;
referents.put(obj, e);
}
return e.referent;
}
public void enc_ndr_referent(Object obj, int type) {
if (obj == null) {
enc_ndr_long(0);
return;
}
switch (type) {
case 1: /* unique */
case 3: /* ref */
enc_ndr_long(System.identityHashCode(obj));
return;
case 2: /* ptr */
enc_ndr_long(getDceReferent(obj));
return;
}
}
public String toString() {
return "start=" + start + ",index=" + index + ",length=" + getLength();
}
}