public static Packet buildIpV4(
MacAddress srcAddress_mac,
MacAddress dstAddrress_mac,
IpV4Packet.Builder builder_ipv4)
{
org.pcap4j.packet.Packet.Builder builder = null;
EthernetPacketType etherType; //EtherType etherType = null;
Packet p = null;
if (ppp)
{
etherType = EthernetPacketType.PointToPointProtocolOverEthernetSessionStage; //etherType = EtherType.PPPOE_SESSION_STAGE;
UnknownPacket.Builder pppBuilder = new UnknownPacket.Builder();
byte[] ipData = builder_ipv4.build().getRawData();
byte[] lenb = new byte[2];
ByteShortConvert.toByteArray((short)(ipData.length + 2), lenb, 0);
byte[] pppHead = new byte[8];
System.arraycopy(pppHead_static, 0, pppHead, 0, pppHead.length);
System.arraycopy(lenb, 0, pppHead, 4, 2);
byte[] newData = new byte[pppHead.length + ipData.length];
System.arraycopy(pppHead, 0, newData, 0, pppHead.length);
System.arraycopy(ipData, 0, newData, 8, ipData.length);
pppBuilder.rawData(newData);
builder = pppBuilder;
}
else
{
etherType = EtherType.IPV4;
builder = builder_ipv4;
}
EthernetPacket.Builder etherBuilder = new EthernetPacket.Builder();
etherBuilder.dstAddr(dstAddrress_mac)
.srcAddr(srcAddress_mac)
.type(etherType)
.payloadBuilder(builder)
.paddingAtBuild(true);
p = etherBuilder.build();
return(p);
}