com.hierynomus.mssmb2.messages.SMB2ChangeNotifyResponse Maven / Gradle / Ivy

Go to download
Show more of this group Show more artifacts with this name
Show all versions of smbj Show documentation
SMB2 protocol library for communication with Windows servers
There is a newer version: 0.13.0
/*
 * Copyright (C)2016 - SMBJ Contributors
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package com.hierynomus.mssmb2.messages;

import com.hierynomus.mserref.NtStatus;
import com.hierynomus.msfscc.FileNotifyAction;
import com.hierynomus.mssmb2.SMB2Packet;
import com.hierynomus.protocol.commons.Charsets;
import com.hierynomus.protocol.commons.EnumWithValue;
import com.hierynomus.protocol.commons.buffer.Buffer;
import com.hierynomus.smb.SMBBuffer;

import java.util.ArrayList;
import java.util.List;

/**
 * [MS-SMB2].pdf 2.2.36 SMB2 CHANGE_NOTIFY Response
 *
 */
public class SMB2ChangeNotifyResponse extends SMB2Packet {

    List fileNotifyInfoList = new ArrayList<>();

    @Override
    protected void readMessage(SMBBuffer buffer) throws Buffer.BufferException {
        buffer.skip(2); // StructureSize (2 bytes)
        int outputBufferOffset = buffer.readUInt16(); // OutputBufferOffset (2 bytes)
        int length = buffer.readUInt32AsInt();// OutputBufferLength (4 bytes)
        if (outputBufferOffset > 0 && length > 0) {
            fileNotifyInfoList = readFileNotifyInfo(buffer, outputBufferOffset);
        }
        // Ensure the read position is set to the end of this packet.
        // The FileNotifyInfo blocks have padding to align them on 4 byte boundaries.
        buffer.rpos(header.getHeaderStartPosition() + outputBufferOffset + length);
    }

    private List readFileNotifyInfo(SMBBuffer buffer, int outputBufferOffset)
        throws Buffer.BufferException {
        List notifyInfoList = new ArrayList<>();
        buffer.rpos(header.getHeaderStartPosition() + outputBufferOffset); // Ensure that we move relative to the header position
        int currentPos = buffer.rpos();
        int nextEntryOffset;
        long fileNameLen;
        String fileName;

        do {
            nextEntryOffset = (int) buffer.readUInt32();
            FileNotifyAction action = EnumWithValue.EnumUtils.valueOf(buffer.readUInt32(), FileNotifyAction.class, null);
            fileNameLen = buffer.readUInt32();
            fileName = buffer.readString(Charsets.UTF_16LE, (int) fileNameLen / 2);
            notifyInfoList.add(new FileNotifyInfo(action, fileName));
            if (nextEntryOffset != 0) {
                currentPos += nextEntryOffset;
                buffer.rpos(currentPos);
            }
        } while (nextEntryOffset != 0);

        return notifyInfoList;
    }

    public List getFileNotifyInfoList() {
        return fileNotifyInfoList;
    }

    public class FileNotifyInfo {
        FileNotifyAction action;
        String fileName;

        FileNotifyInfo(FileNotifyAction action, String fileName) {
            this.action = action;
            this.fileName = fileName;
        }

        public FileNotifyAction getAction() {
            return action;
        }

        public String getFileName() {
            return fileName;
        }

        @Override
        public String toString() {
            return "FileNotifyInfo{" +
                "action=" + action +
                ", fileName='" + fileName + '\'' +
                '}';
        }
    }
}