IPV6 to number

[Turan Can 3]

Hi All,

 

I want to convert IPV6 to digital number. I need to make "IP2Location" IPV4 and IPV6 database query. I need help with this.

I added a working example for IPV4.

The biggest problem here is that the integer value is a certain number.
Since IPV6 is longer than numbers, even string is sufficient.

 

function GetIPNumberIPV4(ip: string): integer;
var
  List: TStringList;
  A, B, C, D, E, F: integer; //Biginteger...?
  total: string;
begin
  Result := 0;

  if ip = '::1' then
    ip := '127.0.0.1';

  List := TStringList.Create;
  try
    List.Delimiter := '.';
    List.StrictDelimiter := True;
    List.DelimitedText := ip;

    A := strtoint(List[0]);
    B := strtoint(List[1]);
    C := strtoint(List[2]);
    D := strtoint(List[3]);

 ////Result :=  (A shl 40) +  (B shl 32) + (C shl 24) + (D shl 16) + (E shl 8) + F; // BIG INTEGER PROBLEMS..

     Result := (A shl 24) + (B shl 16) + (C shl 8) + D;
  finally
    List.Free;
  end;
end;

 

 

IPV4 and IPV6 An example of a code that works correctly, but in c #, :(

 

        private void button1_Click(object sender, EventArgs e)
        {
            //string strIP = "64.233.191.255";
            string strIP = "2404:6800:4001:805::1006";
            System.Net.IPAddress address;
            System.Numerics.BigInteger ipnum;

            if (System.Net.IPAddress.TryParse(strIP, out address))
            {
                byte[] addrBytes = address.GetAddressBytes();

                if (System.BitConverter.IsLittleEndian)
                {
                    System.Collections.Generic.List<byte> byteList = new System.Collections.Generic.List<byte>(addrBytes);
                    byteList.Reverse();
                    addrBytes = byteList.ToArray();
                }

                if (addrBytes.Length > 8)
                {
                    //IPv6
                    ipnum = System.BitConverter.ToUInt64(addrBytes, 8);
                    ipnum <<= 64;
                    ipnum += System.BitConverter.ToUInt64(addrBytes, 0);
                }
                else
                {
                    //IPv4
                    ipnum = System.BitConverter.ToUInt32(addrBytes, 0);
                }
            }
        }
 

[Turan Can 3]

Is there a type that can hold a number larger than "int64"? A helper.pas or function etc.

"47875086426098177934326549022813196294" big lenght 38 or 50.

 

 

[Lars Fosdal 1792]

An IPv6 address is 128 bits. The answer is no. You'd need two UInt64s to hold that.

[Lars Fosdal 1792]

That said, there is BigInteger from https://github.com/rvelthuis/DelphiBigNumbers

[Turan Can 3]

Dear Lars,

 

Thanks for the quick response

 

I tried this, but it didn't work. He did not accept the big number.

 

....

var

b:BigInteger;

begin

b:=47875086426098177934326549022813196294; //does not run the project.

 

https://github.com/rvelthuis/DelphiBigNumbers

http://www.rvelthuis.de/programs/bigintegers.html

 

[vfbb 285]

You need to put as string to compile.

 

var

b:BigInteger;

begin

b:=‘47875086426098177934326549022813196294’;

[David Heffernan 2345]

2 hours ago, Turan Can said:

Dear Lars,

 

Thanks for the quick response

 

I tried this, but it didn't work. He did not accept the big number.

 

....

var

b:BigInteger;

begin

b:=47875086426098177934326549022813196294; //does not run the project.

 

https://github.com/rvelthuis/DelphiBigNumbers

http://www.rvelthuis.de/programs/bigintegers.html

 

If that code would compile, then there wouldn't be much point in having the library. Think about what the literal on the rhs of the assignment actually is. 

[Turan Can 3]

Never mind everything.
I didn't ask anything.

The real problem is this.
I need the code that converts IPV6 to digital number.

[vfbb 285]

uses
  System.SysUtils, VCL.Dialogs, Velthuis.BigIntegers;

function IPV6ToNumberDigits(const AIPV6: string): string;
var
  LBigInteger: BigInteger;
begin
  BigInteger.Hex;
  LBigInteger := AIPV6.Replace(':', '', [rfReplaceAll]);
  BigInteger.Decimal;
  Result := string(LBigInteger);
end;

function NumberDigitsToIPV6(const ANumberDigits: string): string;
var
  LBigInteger: BigInteger;
  I: Integer;
begin
  LBigInteger := ANumberDigits;
  BigInteger.Hex;
  Result := string(LBigInteger).ToLower.PadLeft(32, '0');
  BigInteger.Decimal;
  for I := 0 to 6 do
    Result := Result.Insert((4 * (I+1)) + I, ':');
end;

procedure TForm1.FormCreate(Sender: TObject);
const
  IPV6_EXAMPLE = '2001:0db8:85a3:08d3:1319:8a2e:0370:7344';
begin
  showmessage('Original: ' + IPV6_EXAMPLE + #13#10 +
    'Number digits: ' + IPV6ToNumberDigits(IPV6_EXAMPLE) + #13#10 +
    'IPV6 of the number digits: ' + NumberDigitsToIPV6(IPV6ToNumberDigits(IPV6_EXAMPLE)));
end;

Result:

Original: 2001:0db8:85a3:08d3:1319:8a2e:0370:7344
Number digits: 42540766452641195744311209248773141316
IPV6 of the number digits: 2001:0db8:85a3:08d3:1319:8a2e:0370:7344

Remarks: This solution is not thread-safe.

Edited April 9, 2020 by vfbb

[Rollo62 536]

@vfbb

Why do you think this is not threadsafe, because of the

AIPV6.Replace(

or because of the use of BigInteger at all ?

 

When using local string copies of the first case, this should be OK,
or are the BigInteger intrinsically not threadsafe (never used them yet) ?

 

 

[vfbb 285]

4 hours ago, Rollo62 said:

@vfbb

Why do you think this is not threadsafe, because of the

AIPV6.Replace(

or because of the use of BigInteger at all ?

 

When using local string copies of the first case, this should be OK,
or are the BigInteger intrinsically not threadsafe (never used them yet) ?

Because the used methods of the BigInteger changes a global variable.

BigInteger.Hex;
BigInteger.Decimal;

But I was looking, it is possible to avoid these methods, so this new example will be safe:

uses
  System.SysUtils, Velthuis.BigIntegers;

function IPV6ToNumberDigits(const AIPV6: string): string;
var
  LBigInteger: BigInteger;
begin
  if not BigInteger.TryParse(AIPV6.Replace(':', '', [rfReplaceAll]), 16, LBigInteger) then
    Exit('');
  Result := LBigInteger.ToString;
end;

function NumberDigitsToIPV6(const ANumberDigits: string): string;
var
  I: Integer;
begin
  if ANumberDigits.IsEmpty then
    Exit('');
  Result := BigInteger(ANumberDigits).ToHexString.ToLower.PadLeft(32, '0');
  for I := 0 to 6 do
    Result := Result.Insert((4 * (I+1)) + I, ':');
end;

 

[limelect 48]

If you have no solution yet I have it on Freelancer.

[Turan Can 3]

Thank you very much for your support.
I did this, but bigint didn't work for me. I'll check again.