public static int GenerateSequenceNumber(IPv4 localHost,
IPv4 remoteHost,
ushort localPort,
ushort remotePort)
{
// No MD5 for now so perform a weak hash
long isn = DateTime.UtcNow.Ticks;
snBase = snBase + 2287 * snBase;
isn += snBase;
int i = 0;
foreach (byte b in localHost.GetAddressBytes())
{
isn ^= ((long)b) << i;
i += 8;
}
foreach (byte b in localHost.GetAddressBytes())
{
isn ^= ((long)b) << i;
i += 8;
}
isn += (localPort << 16) | remotePort;
return((int)((isn >> 32) ^ isn));
}
public int Pack(byte[] !dstBuffer, ref int offset)
{
dstBuffer[offset++] = option;
dstBuffer[offset++] = (byte)payloadLength;
byte[] b = address.GetAddressBytes();
dstBuffer[offset++] = b[0];
dstBuffer[offset++] = b[1];
dstBuffer[offset++] = b[2];
dstBuffer[offset++] = b[3];
return(payloadLength + 2);
}
public byte[] GetAddressBytes()
{
return(m_addr.GetAddressBytes());
}