org.pcap4j.packet.Ssh2UnimplementedPacket Maven / Gradle / Ivy
/*_##########################################################################
_##
_## Copyright (C) 2014 Pcap4J.org
_##
_##########################################################################
*/
package org.pcap4j.packet;
import java.util.ArrayList;
import java.util.List;
import org.pcap4j.packet.namednumber.Ssh2MessageNumber;
import org.pcap4j.util.ByteArrays;
/**
* @author Kaito Yamada
* @since pcap4j 1.0.1
*/
public final class Ssh2UnimplementedPacket extends AbstractPacket {
/** */
private static final long serialVersionUID = -8439655903366307992L;
private final Ssh2UnimplementedHeader header;
/**
* A static factory method. This method validates the arguments by {@link
* ByteArrays#validateBounds(byte[], int, int)}, which may throw exceptions undocumented here.
*
* @param rawData rawData
* @param offset offset
* @param length length
* @return a new Ssh2UnimplementedPacket object.
* @throws IllegalRawDataException if parsing the raw data fails.
*/
public static Ssh2UnimplementedPacket newPacket(byte[] rawData, int offset, int length)
throws IllegalRawDataException {
ByteArrays.validateBounds(rawData, offset, length);
return new Ssh2UnimplementedPacket(rawData, offset, length);
}
private Ssh2UnimplementedPacket(byte[] rawData, int offset, int length)
throws IllegalRawDataException {
this.header = new Ssh2UnimplementedHeader(rawData, offset, length);
}
private Ssh2UnimplementedPacket(Builder builder) {
if (builder == null) {
StringBuilder sb = new StringBuilder();
sb.append("builder: ").append(builder);
throw new NullPointerException(sb.toString());
}
this.header = new Ssh2UnimplementedHeader(builder);
}
@Override
public Ssh2UnimplementedHeader getHeader() {
return header;
}
@Override
public Builder getBuilder() {
return new Builder(this);
}
/**
* @author Kaito Yamada
* @since pcap4j 1.0.1
*/
public static final class Builder extends AbstractBuilder {
private int sequenceNumber;
/** */
public Builder() {}
private Builder(Ssh2UnimplementedPacket packet) {
this.sequenceNumber = packet.header.sequenceNumber;
}
/**
* @param sequenceNumber sequenceNumber
* @return this Builder object for method chaining.
*/
public Builder sequenceNumber(int sequenceNumber) {
this.sequenceNumber = sequenceNumber;
return this;
}
@Override
public Ssh2UnimplementedPacket build() {
return new Ssh2UnimplementedPacket(this);
}
}
/**
* @author Kaito Yamada
* @version pcap4j 1.0.1
*/
public static final class Ssh2UnimplementedHeader extends AbstractHeader {
/*
* http://tools.ietf.org/html/rfc4253
*
* byte SSH_MSG_UNIMPLEMENTED
* uint32 packet sequence number of rejected message
*/
/** */
private static final long serialVersionUID = 1942311282988657234L;
private final Ssh2MessageNumber messageNumber = Ssh2MessageNumber.SSH_MSG_UNIMPLEMENTED;
private final int sequenceNumber;
private Ssh2UnimplementedHeader(byte[] rawData, int offset, int length)
throws IllegalRawDataException {
if (length < 5) {
StringBuilder sb = new StringBuilder(80);
sb.append("The data is too short to build an SSH2 Unimplemented header. data: ")
.append(new String(rawData))
.append(", offset: ")
.append(offset)
.append(", length: ")
.append(length);
throw new IllegalRawDataException(sb.toString());
}
if (!Ssh2MessageNumber.getInstance(rawData[offset])
.equals(Ssh2MessageNumber.SSH_MSG_UNIMPLEMENTED)) {
StringBuilder sb = new StringBuilder(120);
sb.append("The data is not an SSH2 Unimplemented message. data: ")
.append(new String(rawData))
.append(", offset: ")
.append(offset)
.append(", length: ")
.append(length);
throw new IllegalRawDataException(sb.toString());
}
this.sequenceNumber = ByteArrays.getInt(rawData, 1 + offset);
}
private Ssh2UnimplementedHeader(Builder builder) {
this.sequenceNumber = builder.sequenceNumber;
}
/** @return messageNumber */
public Ssh2MessageNumber getMessageNumber() {
return messageNumber;
}
/** @return sequenceNumber */
public int getSequenceNumber() {
return sequenceNumber;
}
/** @return sequenceNumber */
public long getSequenceNumberAsLong() {
return sequenceNumber & 0xFFFFFFFFL;
}
@Override
protected List getRawFields() {
List rawFields = new ArrayList();
rawFields.add(new byte[] {messageNumber.value()});
rawFields.add(ByteArrays.toByteArray(sequenceNumber));
return rawFields;
}
@Override
public int length() {
return 5;
}
@Override
protected String buildString() {
StringBuilder sb = new StringBuilder();
String ls = System.getProperty("line.separator");
sb.append("[SSH2 Unimplemented Header (").append(length()).append(" bytes)]").append(ls);
sb.append(" Message Number: ").append(messageNumber).append(ls);
sb.append(" packet sequence number: ").append(getSequenceNumberAsLong()).append(ls);
return sb.toString();
}
@Override
public boolean equals(Object obj) {
if (obj == this) {
return true;
}
if (!this.getClass().isInstance(obj)) {
return false;
}
Ssh2UnimplementedHeader other = (Ssh2UnimplementedHeader) obj;
return sequenceNumber == other.sequenceNumber;
}
@Override
protected int calcHashCode() {
int result = 17;
result = 31 * result + sequenceNumber;
return result;
}
}
}
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