public static void Main1(System.String[] args)
{
byte[] bytes = HeaderGenerator.generateRandomEthernetHeader();
System.Console.Error.WriteLine(HexHelper.toString(bytes));
bytes = HeaderGenerator.generateRandomIPHeader();
System.Console.Error.WriteLine(HexHelper.toString(bytes));
bytes = HeaderGenerator.generateRandomARPHeader();
System.Console.Error.WriteLine(HexHelper.toString(bytes));
}
/// <summary> Generate a pseudo-random network packet.
/// </summary>
/// <returns> an array of bytes containing a randomly generated
/// ethernet network packet. Packet can encapsulate any known protocol.
///
/// </returns>
public static byte[] generate()
{
// create ethernet header
byte[] packet = HeaderGenerator.generateRandomEthernetHeader();
int eProto = ArrayHelper.extractInteger(packet, Packets.EthernetFields.ETH_CODE_POS, Packets.EthernetFields.ETH_CODE_LEN);
// figure out what type of packet should be encapsulated after the
// newly generated ethernet header.
switch (eProto)
{
case Packets.EthernetProtocols_Fields.IP:
byte[] ipHeader = HeaderGenerator.generateRandomIPHeader();
packet = ArrayHelper.join(packet, ipHeader);
// figure out what type of protocol should be encapsulated after the
// newly generated IP header.
int ipProto = ArrayHelper.extractInteger(ipHeader, Packets.IPFields_Fields.IP_CODE_POS, Packets.IPFields_Fields.IP_CODE_LEN);
switch (ipProto)
{
case Packets.IPProtocols_Fields.UDP:
byte[] udpHeader = HeaderGenerator.generateRandomUDPHeader();
packet = ArrayHelper.join(packet, udpHeader);
break;
case Packets.IPProtocols_Fields.ICMP:
byte[] icmpHeader = HeaderGenerator.generateRandomICMPHeader();
packet = ArrayHelper.join(packet, icmpHeader);
break;
case Packets.IPProtocols_Fields.TCP:
byte[] tcpHeader = HeaderGenerator.generateRandomTCPHeader();
packet = ArrayHelper.join(packet, tcpHeader);
break;
default:
break;
}
break;
case Packets.EthernetProtocols_Fields.ARP:
byte[] arpHeader = HeaderGenerator.generateRandomARPHeader();
packet = ArrayHelper.join(packet, arpHeader);
break;
default:
break;
}
return(packet);
}