1 /* 2 * Copyright (c) 2006-2011 Christian Plattner. All rights reserved. 3 * Please refer to the LICENSE.txt for licensing details. 4 */ 5 package ch.ethz.ssh2.packets; 6 7 import java.io.IOException; 8 9 /** 10 * PacketOpenSessionChannel. 11 * 12 * @author Christian Plattner 13 * @version 2.50, 03/15/10 14 */ 15 public class PacketOpenSessionChannel 16 { 17 byte[] payload; 18 19 int channelID; 20 int initialWindowSize; 21 int maxPacketSize; 22 23 public PacketOpenSessionChannel(int channelID, int initialWindowSize, 24 int maxPacketSize) 25 { 26 this.channelID = channelID; 27 this.initialWindowSize = initialWindowSize; 28 this.maxPacketSize = maxPacketSize; 29 } 30 31 public PacketOpenSessionChannel(byte payload[], int off, int len) throws IOException 32 { 33 this.payload = new byte[len]; 34 System.arraycopy(payload, off, this.payload, 0, len); 35 36 TypesReader tr = new TypesReader(payload); 37 38 int packet_type = tr.readByte(); 39 40 if (packet_type != Packets.SSH_MSG_CHANNEL_OPEN) 41 throw new IOException("This is not a SSH_MSG_CHANNEL_OPEN! (" 42 + packet_type + ")"); 43 44 channelID = tr.readUINT32(); 45 initialWindowSize = tr.readUINT32(); 46 maxPacketSize = tr.readUINT32(); 47 48 if (tr.remain() != 0) 49 throw new IOException("Padding in SSH_MSG_CHANNEL_OPEN packet!"); 50 } 51 52 public byte[] getPayload() 53 { 54 if (payload == null) 55 { 56 TypesWriter tw = new TypesWriter(); 57 tw.writeByte(Packets.SSH_MSG_CHANNEL_OPEN); 58 tw.writeString("session"); 59 tw.writeUINT32(channelID); 60 tw.writeUINT32(initialWindowSize); 61 tw.writeUINT32(maxPacketSize); 62 payload = tw.getBytes(); 63 } 64 return payload; 65 } 66 } 67
