The two functions in NBBot called UDPChecksum() and SubChecksum(), are they proven to work?

[quote author=PiaNKA link=board=17;threadid=7407;start=0#msg66871 date=1088026878]
The two functions in NBBot called UDPChecksum() and SubChecksum(), are they proven to work?
[/quote]

test them :X

A little rant on forum etiquette...

1.) If you wanted this to go to Adron, you should have sent him a private message. If you wanted other people to reply to your question, a more descriptive title, such as "Accuracy of NBBot Checksum functions" might have been more appropriate.

2.) Gosu -- this might be a bit of a suprise to you, but you don't have to reply to *every* thread. You don't contribute much at all to the realm of original knowledge. To suggest that he "test" the functions would be to suggest that he compile a list of all possible input and output values and run them through the function. Impractical, I might say. And warzone's thread -- your blinding revelation of "buy a book" (where one or two people had already suggested it) is the same way. Perhaps suggesting a specific book would have been helpful, but what you said was just a way to get your name on the post.

And I'm spent.

Please accept my apology;)

[quote author=Myndfyre link=board=17;threadid=7407;start=0#msg66892 date=1088032260]
A little rant on forum etiquette...

1.) If you wanted this to go to Adron, you should have sent him a private message. If you wanted other people to reply to your question, a more descriptive title, such as "Accuracy of NBBot Checksum functions" might have been more appropriate.

2.) Gosu -- this might be a bit of a suprise to you, but you don't have to reply to *every* thread. You don't contribute much at all to the realm of original knowledge. To suggest that he "test" the functions would be to suggest that he compile a list of all possible input and output values and run them through the function. Impractical, I might say. And warzone's thread -- your blinding revelation of "buy a book" (where one or two people had already suggested it) is the same way. Perhaps suggesting a specific book would have been helpful, but what you said was just a way to get your name on the post.

And I'm spent.
[/quote]

is this a wasted post? just like wasted bandwidth to brighten the day!

GoSuGaMING: This might also come as a surprise to you, but a lot of people here think you are a complete and total ass. If you don't clean up your act, I will request that you be banned from the forum - and I'm on excellent terms with the forum admins, so my request WILL be granted.

You have been warned.

On a lighter note, can anyone post UDPChecksum() and SubChecksum() (maybe Pianka)?

I'm curious as to what it looks like and how it works....

[quote author=Zakath link=board=17;threadid=7407;start=0#msg66928 date=1088042074]
GoSuGaMING: This might also come as a surprise to you, but a lot of people here thing you are a complete and total ass.[/quote]

I agree totally.

[quote author=Kk)Blaze(kK link=board=17;threadid=7407;start=0#msg66931 date=1088043251]
[quote author=Zakath link=board=17;threadid=7407;start=0#msg66928 date=1088042074]
GoSuGaMING: This might also come as a surprise to you, but a lot of people here thing you are a complete and total ass.[/quote]

I agree totally.
[/quote]Second.

Anyway, I'd also like to see these functions.

[code]
unsigned long subchecksum(unsigned char *buf, int len)
{
   unsigned sum1=0, sum2=0;
   unsigned char *p;
   p = buf+len-1;
   while(len--) {
      sum2 += *p--;
      if(sum2 > 0xff)
         sum2 -= 0xff;
      sum1 += sum2;
   }
   return ((sum2 & 0xff)<<8) | ((sum1 % 0xff) & 0xff);
}
[/code]

I cant find the other

[code]Public Function UDPChecksum(ByVal buffer As String, ByVal size As Long) As Long
Dim a&, b&, n&, q&, sum&
For n = 0 To size - 1
a = a + ((n + 1) * Asc(Mid$(buffer, n + 1, 1)))
b = b + ((n + 2) * Asc(Mid$(buffer, n + 1, 1)))
Next n
q = a
While (q > &HFF)
q = (q / &H100) + (q Mod &H100)
Wend
sum = q
q = b
While (q > &HFF)
q = (q / &H100) + (q Mod &H100)
Wend
sum = sum + (LShift(&HFF - q, 8))
UDPChecksum = sum
End Function
[/code]

And the vb version of checksum...

[code]
Public Sub InitCRC32()
Dim i As Long, J As Long, K As Long, XorVal As Long
Static CRC32Initialized As Boolean
If CRC32Initialized Then Exit Sub
CRC32Initialized = True
For i = 0 To 255
K = i
For J = 1 To 8
If K And 1 Then XorVal = CRC32_POLYNOMIAL Else XorVal = 0
If K < 0 Then K = ((K And &H7FFFFFFF) \ 2) Or &H40000000 Else K = K \ 2
K = K Xor XorVal
Next
CRC32Table(i) = K
Next
End Sub
Public Function CRC32(ByVal data As String) As Long
Dim i As Long, J As Long
Call InitCRC32
CRC32 = &HFFFFFFFF
For i = 1 To Len(data)
J = CByte(Asc(Mid(data, i, 1))) Xor (CRC32 And &HFF&)
If CRC32 < 0 Then CRC32 = ((CRC32 And &H7FFFFFFF) \ &H100&) Or &H800000 Else CRC32 = CRC32 \ &H100&
CRC32 = CRC32 Xor CRC32Table(J)
Next
CRC32 = Not CRC32
End Function

'Put this in some module...
Public Const CRC32_POLYNOMIAL As Long = &HEDB88320
Public CRC32Table(0 To 255) As Long[/code]

[quote author=Kk)Blaze(kK link=board=17;threadid=7407;start=0#msg66969 date=1088054503]
And the vb version of checksum...
[/quote]

Wrong checksum -- read the thread before replying.

So does that mean nobody is gonna post it for me? :(

[quote author=Zakath link=board=17;threadid=7407;start=0#msg66928 date=1088042074]
GoSuGaMING: This might also come as a surprise to you, but a lot of people here think you are a complete and total ass. If you don't clean up your act, I will request that you be banned from the forum - and I'm on excellent terms with the forum admins, so my request WILL be granted.

You have been warned.
[/quote]

You forgot "moron!"

Would someone explain what those 2 functions are used for? I am a little lost >:(

[quote author=BaDDBLooD link=board=17;threadid=7407;start=15#msg67535 date=1088398022]
Would someone explain what those 2 functions are used for? I am a little lost >:(
[/quote]

udp packet checksum which is used for the games that use udp.

Which games would that be?

[quote author=BaDDBLooD link=board=17;threadid=7407;start=15#msg67545 date=1088399610]
Which games would that be?
[/quote]

prolly starcraft & Broodwar

[quote author=GoSuGaMING link=board=17;threadid=7407;start=0#msg66927 date=1088041938]
[quote author=Myndfyre link=board=17;threadid=7407;start=0#msg66892 date=1088032260]
A little rant on forum etiquette...

1.) If you wanted this to go to Adron, you should have sent him a private message. If you wanted other people to reply to your question, a more descriptive title, such as "Accuracy of NBBot Checksum functions" might have been more appropriate.

2.) Gosu -- this might be a bit of a suprise to you, but you don't have to reply to *every* thread. You don't contribute much at all to the realm of original knowledge. To suggest that he "test" the functions would be to suggest that he compile a list of all possible input and output values and run them through the function. Impractical, I might say. And warzone's thread -- your blinding revelation of "buy a book" (where one or two people had already suggested it) is the same way. Perhaps suggesting a specific book would have been helpful, but what you said was just a way to get your name on the post.

And I'm spent.
[/quote]

is this a wasted post? just like wasted bandwidth to brighten the day!
[/quote]

It is only wasted if you don't learn from it that many forum regulars consider your posts to be drivel.

[quote author=PiaNKA link=board=17;threadid=7407;start=0#msg66871 date=1088026878]
The two functions in NBBot called UDPChecksum() and SubChecksum(), are they proven to work?
[/quote]

As far as I know, they work. They've been around for years, so they must be doing something right.

Whoever asked for the function -- this can be gotten from the NBBot source code, which can be found at, among other places, at warz' site --> [s]http://tks.slacktech.com[/s] Ok, the actual page is Here if you don't want to make the 2 clicks to find it (source, then cpp).