protected virtual int GetRecvRandLen(int datalength, xorshift128plus rd, byte[] last_hash)
{
if (datalength + Server.overhead > recv_tcp_mss)
{
rd.init_from_bin(last_hash, datalength);
return((int)(rd.next() % 521));
}
if (datalength >= 1440 || datalength + Server.overhead == recv_tcp_mss)
{
return(0);
}
rd.init_from_bin(last_hash, datalength);
if (datalength > 1300)
{
return((int)(rd.next() % 31));
}
if (datalength > 900)
{
return((int)(rd.next() % 127));
}
if (datalength > 400)
{
return((int)(rd.next() % 521));
}
return((int)(rd.next() % (ulong)(recv_tcp_mss - datalength - Server.overhead)));
//return (int)(random.next() % 1021);
}
protected override int GetRandLen(int datalength, xorshift128plus random, byte[] last_hash)
{
int other_data_size = datalength + Server.overhead;
// 一定要在random使用前初始化，以保证服务器与客户端同步，保证包大小验证结果正确
random.init_from_bin(last_hash, datalength);
if (other_data_size >= data_size_list0[data_size_list0.Length - 1])
{
if (datalength >= 1440)
{
return(0);
}
if (datalength > 1300)
{
return((int)(random.next() % 31));
}
if (datalength > 900)
{
return((int)(random.next() % 127));
}
if (datalength > 400)
{
return((int)(random.next() % 521));
}
return((int)(random.next() % 1021));
}
int pos = FindPos(data_size_list0, other_data_size);
int final_pos = pos + (int)(random.next() % (ulong)(data_size_list0.Length - pos));
return(data_size_list0[final_pos] - other_data_size);
}
protected override void InitDataSizeList()
{
xorshift128plus random = new xorshift128plus();
byte[] newKey = new byte[Server.key.Length];
Server.key.CopyTo(newKey, 0);
for (int i = 0; i < 8; i++)
{
newKey[i] ^= key_change_datetime_key_bytes[i];
}
random.init_from_bin(newKey);
int len = (int)(random.next() % (8 + 16) + (4 + 8));
List <int> data_list = new List <int>();
for (int i = 0; i < len; ++i)
{
data_list.Add((int)(random.next() % 2340 % 2040 % 1440));
}
data_list.Sort();
int old_len = data_list.Count;
CheckAndPatchDataSize(data_list, random);
if (old_len != data_list.Count)
{
data_list.Sort();
}
data_size_list0 = data_list.ToArray();
}
protected int GetRandStartPos(int rand_len, xorshift128plus rd)
{
if (rand_len > 0)
{
return((int)(rd.next() % 8589934609 % (ulong)rand_len));
}
return(0);
}
protected void CheckAndPatchDataSize(List <int> data_list, xorshift128plus random)
{
if (data_list[data_list.Count - 1] < 1300 && data_list.Count < 64)
{
data_list.Add((int)(random.next() % 2340 % 2040 % 1440));
CheckAndPatchDataSize(data_list, random);
}
}
protected override int GetRandLen(int datalength, xorshift128plus random, byte[] last_hash)
{
int other_data_size = datalength + Server.overhead;
if (other_data_size >= data_size_list0[data_size_list0.Length - 1])
{
return(0);
}
int pos = FindPos(data_size_list0, other_data_size);
return(data_size_list0[pos] - other_data_size);
}
protected override int GetRandLen(int datalength, xorshift128plus rd, byte[] last_hash)
{
rd.init_from_bin(last_hash, datalength);
var other_data_size = datalength + Server.overhead;
if (other_data_size >= data_size_list0[data_size_list0.Length - 1])
{
return(0);
}
var pos = FindPos(data_size_list0, other_data_size);
return(data_size_list0[pos] - other_data_size);
}
protected override void InitDataSizeList()
{
xorshift128plus random = new xorshift128plus();
random.init_from_bin(Server.key);
int len = (int)(random.next() % (8 + 16) + (4 + 8));
List <int> data_list = new List <int>();
for (int i = 0; i < len; ++i)
{
data_list.Add((int)(random.next() % 2340 % 2040 % 1440));
}
data_list.Sort();
data_size_list0 = data_list.ToArray();
}
protected override int GetRandLen(int datalength, xorshift128plus random, byte[] last_hash)
{
int other_data_size = datalength + Server.overhead;
if (other_data_size >= data_size_list0[data_size_list0.Length - 1])
{
return(0);
}
random.init_from_bin(last_hash, datalength);
int pos = FindPos(data_size_list0, other_data_size);
int final_pos = pos + (int)(random.next() % (ulong)(data_size_list0.Length - pos));
return(data_size_list0[final_pos] - other_data_size);
}
protected override int GetSendRandLen(int datalength, xorshift128plus rd, byte[] last_hash)
{
if (datalength + Server.overhead > send_tcp_mss)
{
rd.init_from_bin(last_hash, datalength);
return((int)(rd.next() % 521));
}
if (datalength >= 1440 || datalength + Server.overhead == recv_tcp_mss)
{
return(0);
}
rd.init_from_bin(last_hash, datalength);
var pos = FindPos(data_size_list, datalength + Server.overhead);
var final_pos = pos + (int)(rd.next() % (ulong)data_size_list.Length);
if (final_pos < data_size_list.Length)
{
return(data_size_list[final_pos] - datalength - Server.overhead);
}
pos = FindPos(data_size_list2, datalength + Server.overhead);
final_pos = pos + (int)(rd.next() % (ulong)data_size_list2.Length);
if (final_pos < data_size_list2.Length)
{
return(data_size_list2[final_pos] - datalength - Server.overhead);
}
if (final_pos < pos + data_size_list2.Length - 1)
{
return(0);
}
if (datalength > 1300)
{
return((int)(rd.next() % 31));
}
if (datalength > 900)
{
return((int)(rd.next() % 127));
}
if (datalength > 400)
{
return((int)(rd.next() % 521));
}
return((int)(rd.next() % 1021));
}
protected virtual int GetRandLen(int datalength, xorshift128plus rd, byte[] last_hash)
{
if (datalength > 1440)
{
return(0);
}
rd.init_from_bin(last_hash, datalength);
if (datalength > 1300)
{
return((int)(rd.next() % 31));
}
if (datalength > 900)
{
return((int)(rd.next() % 127));
}
if (datalength > 400)
{
return((int)(rd.next() % 521));
}
return((int)(rd.next() % 1021));
}
protected override int GetRandLen(int datalength, xorshift128plus random, byte[] last_hash)
{
if (datalength >= 1440)
{
return(0);
}
random.init_from_bin(last_hash, datalength);
int pos = FindPos(data_size_list, datalength + Server.overhead);
int final_pos = pos + (int)(random.next() % (ulong)(data_size_list.Length));
if (final_pos < data_size_list.Length)
{
return(data_size_list[final_pos] - datalength - Server.overhead);
}
pos = FindPos(data_size_list2, datalength + Server.overhead);
final_pos = pos + (int)(random.next() % (ulong)(data_size_list2.Length));
if (final_pos < data_size_list2.Length)
{
return(data_size_list2[final_pos] - datalength - Server.overhead);
}
if (final_pos < pos + data_size_list2.Length - 1)
{
return(0);
}
if (datalength > 1300)
{
return((int)(random.next() % 31));
}
if (datalength > 900)
{
return((int)(random.next() % 127));
}
if (datalength > 400)
{
return((int)(random.next() % 521));
}
return((int)(random.next() % 1021));
}
protected override void InitDataSizeList()
{
var rd = new xorshift128plus();
rd.init_from_bin(Server.key);
var len = (int)(rd.next() % (8 + 16) + (4 + 8));
var data_list = new List <int>();
for (var i = 0; i < len; ++i)
{
data_list.Add((int)(rd.next() % 2340 % 2040 % 1440));
}
data_list.Sort();
var old_len = data_list.Count;
CheckAndPatchDataSize(data_list, rd);
if (old_len != data_list.Count)
{
data_list.Sort();
}
data_size_list0 = data_list.ToArray();
}
protected new void InitDataSizeList()
{
xorshift128plus random = new xorshift128plus();
random.init_from_bin(Server.key);
int len = (int)(random.next() % (8 + 16) + (4 + 8));
List <int> data_list = new List <int>();
for (int i = 0; i < len; ++i)
{
data_list.Add((int)(random.next() % 2340 % 2040 % 1440));
}
data_list.Sort();
int old_len = data_list.Count;
CheckAndPatchDataSize(data_list, random);
if (old_len != data_list.Count)
{
data_list.Sort();
}
data_size_list0 = data_list.ToArray();
}
protected void InitDataSizeList()
{
var rd = new xorshift128plus(0);
rd.init_from_bin(Server.key);
var len = (int)(rd.next() % 8 + 4);
var data_list = new List <int>();
for (var i = 0; i < len; ++i)
{
data_list.Add((int)(rd.next() % 2340 % 2040 % 1440));
}
data_list.Sort();
data_size_list = data_list.ToArray();
len = (int)(rd.next() % 16 + 8);
data_list.Clear();
for (var i = 0; i < len; ++i)
{
data_list.Add((int)(rd.next() % 2340 % 2040 % 1440));
}
data_list.Sort();
data_size_list2 = data_list.ToArray();
}
protected virtual void InitDataSizeList()
{
xorshift128plus random = new xorshift128plus();
random.init_from_bin(Server.key);
int len = (int)(random.next() % 8 + 4);
List <int> data_list = new List <int>();
for (int i = 0; i < len; ++i)
{
data_list.Add((int)(random.next() % 2340 % 2040 % 1440));
}
data_list.Sort();
data_size_list = data_list.ToArray();
len = (int)(random.next() % 16 + 8);
data_list.Clear();
for (int i = 0; i < len; ++i)
{
data_list.Add((int)(random.next() % 2340 % 2040 % 1440));
}
data_list.Sort();
data_size_list2 = data_list.ToArray();
}
protected int UdpGetRandLen(xorshift128plus rd, byte[] last_hash)
{
rd.init_from_bin(last_hash);
return((int)(rd.next() % 127));
}
