com.hierynomus.mssmb2.messages.SMB2WriteRequest 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

The newest version!

/*
 * 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.mssmb2.*;
import com.hierynomus.smb.SMBBuffer;
import com.hierynomus.smbj.io.ByteChunkProvider;

/**
 * [MS-SMB2].pdf 2.2.21 SMB2 Write Request
 */
public class SMB2WriteRequest extends SMB2MultiCreditPacket {

    private final SMB2FileId fileId;
    private final ByteChunkProvider byteProvider;

    public SMB2WriteRequest(
        SMB2Dialect negotiatedDialect, SMB2FileId fileId, long sessionId, long treeId,
        ByteChunkProvider byteProvider, int maxPayloadSize) {
        super(49, negotiatedDialect, SMB2MessageCommandCode.SMB2_WRITE, sessionId, treeId, Math.min(maxPayloadSize, byteProvider.bytesLeft()));
        this.fileId = fileId;
        this.byteProvider = byteProvider;
    }

    @Override
    protected void writeTo(SMBBuffer buffer) {
        buffer.putUInt16(structureSize); // StructureSize (2 bytes)
        short dataOffset = SMB2PacketHeader.STRUCTURE_SIZE + 48;
        buffer.putUInt16(dataOffset); // DataOffSet (2 bytes)
        buffer.putUInt32(getPayloadSize()); // Length (4 bytes)
        buffer.putUInt64(byteProvider.getOffset()); // Offset (8 bytes)
        fileId.write(buffer);  // FileId (16 bytes)
        buffer.putUInt32(0); // Channel (4 bytes)
        buffer.putUInt32(Math.max(0, byteProvider.bytesLeft() - getPayloadSize())); // RemainingBytes (4 bytes)
        buffer.putUInt16(0); // WriteChannelInfoOffset (2 bytes)
        buffer.putUInt16(0); // WriteChannelInfoLength (2 bytes)
        buffer.putUInt32(0); // Flags (4 bytes)
        byteProvider.writeChunks(buffer, getCreditsAssigned());
    }
}