public List <byte> MakeHeartbeat(byte[] sip, byte[] challenge_seed, bool first = false)
{
List <byte> data = new List <byte>();
// DrcomDialExtProtoHeader - 5 bytes
data.Add(0x07); // code
data.Add(count); // id
data.AddRange(new byte[] { 0x60, 0x00 }); // length
data.Add(0x03); // type
data.Add(0x00); // uid length
data.AddRange(new byte[] { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 }); // mac
data.AddRange(sip); // AuthHostIP
if (first)
{
data.AddRange(new byte[] { 0x00, 0x62, 0x00 });
data.Add(pppoe_flag);
}
else
{
data.AddRange(new byte[] { 0x00, 0x63, 0x00 });
data.Add(pppoe_flag);
}
data.AddRange(challenge_seed); // Challenge Seed
int encrypt_mode = BitConverter.ToInt32(challenge_seed, 0) & 3;
Tuple <List <byte>, bool> res = KA2.GenerateCRC(challenge_seed, encrypt_mode);
List <byte> crc = res.Item1;
bool foo = res.Item2;
data.AddRange(crc);
if (foo == false)
{
int crc2 = (DrcomCRC32(data.ToArray()) * 19680126) /*& 0xFFFFFFFF*/;
data.RemoveRange(data.Count - 8, 8);
data.AddRange(BitConverter.GetBytes(crc2));
data.AddRange(new byte[] { 0x00, 0x00, 0x00, 0x00 });
}
for (int i = 0; i < 4; i++)
{
for (int j = 0; j < 16; j++)
{
data.Add(0x00);
}
}
return(data);
}
public static List <byte> KeepAlivePackageBuilder(byte number, int random, byte[] tail, byte type = 1, bool first = false)
{
List <byte> data = new List <byte>();
data.Add(0x07);
data.Add(number);
data.AddRange(new byte[] { 0x28, 0x00, 0x0b });
data.Add(type);
if (first)
{
data.AddRange(new byte[] { 0x0f, 0x27 });
}
else
{
data.AddRange(new byte[] { keep_alive2_flag, 0x02 });
}
data.AddRange(new byte[] { 0x2f, 0x12 });
for (int i = 0; i < 6; i++)
{
data.Add(0x00);
}
data.AddRange(tail);
if (type == 3)
{
byte[] foo = new byte[] { 0x00, 0x00, 0x00, 0x00 };
int encrypt_mode = BitConverter.ToInt32(tail, 0) & 3;
Tuple <List <byte>, bool> res = KA2.GenerateCRC(data.ToArray(), encrypt_mode);
List <byte> crc = res.Item1;
bool val = res.Item2;
data.AddRange(crc);
data.AddRange(foo);
for (int i = 0; i < 8; i++)
{
data.Add(0x00);
}
}
else //packet type = 1
{
for (int i = 0; i < 20; i++)
{
data.Add(0x00);
}
}
return(data);
}
public static void BeginHeartbeat(Func <Exception, bool> OnException)
{
onException = OnException;
unchecked
{
if (!BitConverter.IsLittleEndian)
{
exit = onException(new SystemException("Unsupported system"));
if (exit)
{
return;
}
}
Socketx s = new Socketx(AddressFamily.InterNetwork, SocketType.Dgram, ProtocolType.Unspecified);
while (!exit)
{
PPPOEHeartbeat pppoe = new PPPOEHeartbeat();
pppoe.Send(s);
KA2.KeepAlive2(s, pppoe);
}
}
}
