org.pcap4j.packet.IcmpV6HomeAgentAddressDiscoveryReplyPacket Maven / Gradle / Ivy
/*_##########################################################################
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_## Copyright (C) 2018 Pcap4J.org
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_##########################################################################
*/
package org.pcap4j.packet;
import static org.pcap4j.util.ByteArrays.INET6_ADDRESS_SIZE_IN_BYTES;
import static org.pcap4j.util.ByteArrays.SHORT_SIZE_IN_BYTES;
import java.net.Inet6Address;
import java.util.ArrayList;
import java.util.List;
import org.pcap4j.util.ByteArrays;
/**
* Icmpv6 home agent address discovery reply packet.
*
* @see RFC 6275
* @see ICMPv6
* Parameters
* @author Leo Ma
* @since pcap4j 1.7.5
*/
public class IcmpV6HomeAgentAddressDiscoveryReplyPacket extends AbstractPacket {
/** */
private static final long serialVersionUID = 8080366373921919970L;
private final IcmpV6HomeAgentAddressDiscoveryReplyHeader 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 IcmpV6HomeAgentAddressDiscoveryReplyPacket object.
* @throws IllegalRawDataException if parsing the raw data fails.
*/
public static IcmpV6HomeAgentAddressDiscoveryReplyPacket newPacket(
byte[] rawData, int offset, int length) throws IllegalRawDataException {
ByteArrays.validateBounds(rawData, offset, length);
return new IcmpV6HomeAgentAddressDiscoveryReplyPacket(rawData, offset, length);
}
private IcmpV6HomeAgentAddressDiscoveryReplyPacket(byte[] rawData, int offset, int length)
throws IllegalRawDataException {
this.header = new IcmpV6HomeAgentAddressDiscoveryReplyHeader(rawData, offset, length);
}
private IcmpV6HomeAgentAddressDiscoveryReplyPacket(Builder builder) {
this.header = new IcmpV6HomeAgentAddressDiscoveryReplyHeader(builder);
}
@Override
public IcmpV6HomeAgentAddressDiscoveryReplyHeader getHeader() {
return header;
}
@Override
public Builder getBuilder() {
return new Builder(this);
}
/** */
public static final class Builder extends AbstractBuilder {
private short identifier;
private short reserved;
private List homeAgentAddresses;
/** */
public Builder() {
// Do nothing, just used to create a Builder without fields setting
}
private Builder(IcmpV6HomeAgentAddressDiscoveryReplyPacket packet) {
this.identifier = packet.header.identifier;
this.reserved = packet.header.reserved;
this.homeAgentAddresses = packet.header.homeAgentAddresses;
}
/**
* @param identifier identifier
* @return this Builder object for method chaining.
*/
public Builder identifier(short identifier) {
this.identifier = identifier;
return this;
}
/**
* @param reserved reserved
* @return this Builder object for method chaining.
*/
public Builder reserved(short reserved) {
this.reserved = reserved;
return this;
}
/**
* @param homeAgentAddresses homeAgentAddresses
* @return this Builder object for method chaining.
*/
public Builder homeAgentAddresses(List homeAgentAddresses) {
this.homeAgentAddresses = homeAgentAddresses;
return this;
}
@Override
public IcmpV6HomeAgentAddressDiscoveryReplyPacket build() {
return new IcmpV6HomeAgentAddressDiscoveryReplyPacket(this);
}
}
/**
* Icmpv6 home agent address discovery reply header.
*
*
* 0 1 2 3
* 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
* | Identifier | Reserved |
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
* | |
* + +
* | |
* + Home Agent Addresses +
* | |
* + +
* | |
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
*
*
* @see RFC 6275
* @see ICMPv6
* Parameters
* @author Leo Ma
* @since pcap4j 1.7.5
*/
public static final class IcmpV6HomeAgentAddressDiscoveryReplyHeader extends AbstractHeader {
private static final long serialVersionUID = 7184228144196703852L;
private static final int IDENTIFIER_OFFSET = 0;
private static final int IDENTIFIER_SIZE = SHORT_SIZE_IN_BYTES;
private static final int RESERVED_OFFSET = IDENTIFIER_OFFSET + IDENTIFIER_SIZE;
private static final int RESERVED_SIZE = SHORT_SIZE_IN_BYTES;
private static final int HOME_AGENT_ADDRESSES_OFFSET = RESERVED_OFFSET + RESERVED_SIZE;
private static final int HOME_AGENT_ADDRESSES_SIZE = INET6_ADDRESS_SIZE_IN_BYTES;
private static final int ICMPV6_HOME_AGENT_ADDRESS_DISCOVERY_REPLY_HEADER_MIN_SIZE =
HOME_AGENT_ADDRESSES_OFFSET + HOME_AGENT_ADDRESSES_SIZE;
private final short identifier;
private final short reserved;
private final List homeAgentAddresses;
private IcmpV6HomeAgentAddressDiscoveryReplyHeader(byte[] rawData, int offset, int length)
throws IllegalRawDataException {
if (length < ICMPV6_HOME_AGENT_ADDRESS_DISCOVERY_REPLY_HEADER_MIN_SIZE) {
StringBuilder sb = new StringBuilder();
sb.append(
"The data is too short to build an ICMPv6 Home Agent Address Discovery Reply Header(")
.append(ICMPV6_HOME_AGENT_ADDRESS_DISCOVERY_REPLY_HEADER_MIN_SIZE)
.append(" bytes). data: ")
.append(ByteArrays.toHexString(rawData, " "))
.append(", offset: ")
.append(offset)
.append(", length: ")
.append(length);
throw new IllegalRawDataException(sb.toString());
}
this.identifier = ByteArrays.getShort(rawData, IDENTIFIER_OFFSET + offset);
this.reserved = ByteArrays.getShort(rawData, RESERVED_OFFSET + offset);
this.homeAgentAddresses = new ArrayList();
for (int i = HOME_AGENT_ADDRESSES_OFFSET; i < length; i += INET6_ADDRESS_SIZE_IN_BYTES) {
homeAgentAddresses.add(ByteArrays.getInet6Address(rawData, i + offset));
}
}
private IcmpV6HomeAgentAddressDiscoveryReplyHeader(Builder builder) {
this.identifier = builder.identifier;
this.reserved = builder.reserved;
if (builder.homeAgentAddresses != null) {
this.homeAgentAddresses = new ArrayList(builder.homeAgentAddresses);
} else {
this.homeAgentAddresses = new ArrayList(0);
}
}
/** @return identifier */
public short getIdentifier() {
return identifier;
}
/** @return identifier */
public int getIdentifierAsInt() {
return identifier & 0xFFFF;
}
/** @return reserved */
public short getReserved() {
return reserved;
}
/** @return homeAgentAddresses */
public List getHomeAgentAddresses() {
return new ArrayList(homeAgentAddresses);
}
@Override
protected List getRawFields() {
List rawFields = new ArrayList();
rawFields.add(ByteArrays.toByteArray(identifier));
rawFields.add(ByteArrays.toByteArray(reserved));
for (Inet6Address addr : homeAgentAddresses) {
rawFields.add(ByteArrays.toByteArray(addr));
}
return rawFields;
}
@Override
protected int calcLength() {
return homeAgentAddresses.size() * INET6_ADDRESS_SIZE_IN_BYTES + HOME_AGENT_ADDRESSES_OFFSET;
}
@Override
protected String buildString() {
StringBuilder sb = new StringBuilder();
String ls = System.getProperty("line.separator");
sb.append("[ICMPv6 Home Agent Address Discovery Reply Header (")
.append(length())
.append(" bytes)]")
.append(ls);
sb.append(" Identifier: ").append(getIdentifierAsInt()).append(ls);
sb.append(" Reserved: ").append(reserved).append(ls);
for (Inet6Address addr : homeAgentAddresses) {
sb.append(" HomeAgentAddress: ").append(addr);
sb.append(ls);
}
return sb.toString();
}
@Override
public boolean equals(Object obj) {
if (obj == this) {
return true;
}
if (obj == null) {
return false;
}
if (!this.getClass().isInstance(obj)) {
return false;
}
IcmpV6HomeAgentAddressDiscoveryReplyHeader other =
(IcmpV6HomeAgentAddressDiscoveryReplyHeader) obj;
return this.identifier == other.identifier
&& this.reserved == other.reserved
&& this.homeAgentAddresses.equals(other.homeAgentAddresses);
}
@Override
protected int calcHashCode() {
int result = 17;
result = 31 * result + identifier;
result = 31 * result + reserved;
result = 31 * result + homeAgentAddresses.hashCode();
return result;
}
}
}
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