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The core module of Pcap4J.
/*_##########################################################################
_##
_## Copyright (C) 2013-2016 Pcap4J.org
_##
_##########################################################################
*/
package org.pcap4j.packet;
import org.pcap4j.packet.factory.PacketFactories;
import org.pcap4j.packet.namednumber.EtherType;
import org.pcap4j.packet.namednumber.NotApplicable;
/**
* @author Kaito Yamada
* @since pcap4j 0.9.15
*/
abstract class IcmpV4InvokingPacketPacket extends AbstractPacket {
/** */
private static final long serialVersionUID = -739710899445035385L;
/*
* 0 15 31
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
* |IPv4 Header + 64bits of Original Data Datagram(invoking packet)|
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
*
*/
private final Packet payload;
/** */
protected IcmpV4InvokingPacketPacket() {
this.payload = null;
}
/**
* @param rawData rawData
* @param payloadOffset payloadOffset
* @param payloadLength payloadLength
*/
protected IcmpV4InvokingPacketPacket(byte[] rawData, int payloadOffset, int payloadLength) {
Packet p =
PacketFactories.getFactory(Packet.class, EtherType.class)
.newInstance(rawData, payloadOffset, payloadLength, EtherType.IPV4);
if (p instanceof IllegalPacket) {
this.payload = p;
} else if (p.contains(IllegalPacket.class)) {
Packet.Builder builder = p.getBuilder();
byte[] ipRawData = p.get(IllegalPacket.class).getRawData();
builder
.getOuterOf(IllegalPacket.Builder.class)
.payloadBuilder(
PacketFactories.getFactory(Packet.class, NotApplicable.class)
.newInstance(ipRawData, 0, ipRawData.length, NotApplicable.UNKNOWN)
.getBuilder());
for (Packet.Builder b : builder) {
if (b instanceof LengthBuilder) {
((LengthBuilder>) b).correctLengthAtBuild(false);
}
if (b instanceof ChecksumBuilder) {
((ChecksumBuilder>) b).correctChecksumAtBuild(false);
}
}
this.payload = builder.build();
} else {
this.payload = p;
}
}
/** @param builder builder */
protected IcmpV4InvokingPacketPacket(Builder builder) {
if (builder == null) {
StringBuilder sb = new StringBuilder();
sb.append("builder: ").append(builder);
throw new NullPointerException(sb.toString());
}
this.payload = builder.payload;
}
@Override
public Packet getPayload() {
return payload;
}
/**
* @author Kaito Yamada
* @since pcap4j 0.9.15
*/
abstract static class Builder extends AbstractBuilder {
private Packet payload;
/** */
public Builder() {}
/** @param packet packet */
protected Builder(IcmpV4InvokingPacketPacket packet) {
this.payload = packet.payload;
}
/**
* @param payload payload
* @return this Builder object for method chaining.
*/
public Builder payload(Packet payload) {
this.payload = payload;
return this;
}
}
}
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