IP Address belongs to which system script?

[phisher1]

I don't exactly know how I should go about this project I need. I have several Class C IP blocks as well as several different systems. Each system has 1 to 5 C classes assigned to them. I am searching for a way to be able to plug in an IP address and then the php return which system that IP belongs to. This may not be the correct section. Can anyone help or direct me to a more approproate help section?

Thanks,
Dan

[laserlight]

Well, given that you know which group if IP addresses corresponds to which system, it should be a simple matter of comparing $_SERVER['REMOTE_ADDR'] with them.

[phisher1]

Would that not pull the IP address of the user AT the page?

I am trying to create a search function so when I get an abuse email about a certain IP address, I can plug in the IP on a form and the php will return back which system that IP address belongs to.

I've been throwing code together. None of this is functional as of yet, but its my "building blocks"

<?php
$ip = "24.206.158.255";
$long = ip2long($ip);

if ($long === -1) {
print "Invalid IP, please try again";
} else {
}
php?>

<?
$start="416186368";
$end="416194303";

foreach( range((int) $start, (int) $end) as $number ) {
print "$number<br>";
}

?>

If I could convert the IP address into a long number and make an array that includes a range of numbers .. start to end and then assign that array to a "system" Then the php script could return the "system" name if longip is in that array

Does that make sense?

[laserlight]

I see what you mean.

Would it be possible to create a hash function for that?

I've never tried this sort of thing myself.

[phisher1]

I have no idea. =)

What I am seeing to be the easist if not only way to do this is:

html page:
ip address: _________
Submit

php page:
convert IP to long #

section1 = 12345 to 12350 //this being the range of section 1
section2 = 12351 to 12360 //this being the range of section 2

if long # exists in section1 then return
printf "this ip belongs to section1"
else
if long # exists in section2 then return
printf "this ip belongs to section2"
else
printf "this ip does not belong to us"
end

[phisher1]

I think I got it! This is the basic code, not including more than 1 group, but I can just add them (I think)

<?

$ip = $_POST["ip"];
$long = ip2long($ip);

if ($long === -1) {
print "Invalid IP, please try again";
} else {
}

if ($long>="416186367" && $long<="416194304")
{
echo "This IP Address belongs to Section 1.";
}elseif($long > "416194304")
{
echo "This IP Address does NOT belong to Section 1!";
}

?>

Now all I have to do is make it so after the 1st elseif
it looks to another if statement instead of
the echo. Working on that now. =)

[laserlight]

Probably just store

section[1] = 12345
section[2] = 12351

if (long # >= section[1] and long # < section[2])

[laserlight]

looks like we came up with the same idea at the same time 🙂

maybe in terms of an array:

if ($num < $array[0]) {
	//invalid, too small
}

//assume array has a final element for value beyond maximum boundary
for ($i = 1; $i < $array_length; $i++) {
	if ($num < $array[$i]) {
		//return section corresponding to $i
	}
}
//if no matches, then value is beyond maximum boundary

but there's still quite of manual labour to be done first in creating the array 🙁

[phisher1]

but there's still quite of manual labour to be done first in creating the array

Only as much manual labour as the # of arrays you need 😉
I could make it create the arrays based upon ip1 through ip2

Instead I'm just going through all my systems and getting the long# for each start and end ip

then after it works i'll maybe make it create the array on the fly

dunno if that would be wise or not.. but neat to make it work =)

[phisher1]

Slight problem after "revamping" it a little..

$long = ip2long($ip);
// I set several of these at the beginning:
$Terayon_KW1_s = ip2long('24.206.128.0');
$Terayon_KW1_e = ip2long('24.206.158.255');
//s being start e being end

if ($long >= $Terayon_KW1_s && <= $Terayon_KW_e) { echo "blah blah";
}

If I have the && <= Terayon_KW_e in there
then I get
Parse error: parse error, unexpected T_IS_SMALLER_OR_EQUAL

I thought this had something todo with the way I was refering to the variable.. sice the <= requires an int..

If I have only: if ($long >= $Terayon_KW1_s)
though
it "works" ... works as in no error..
if of course doesn't do what i'm trying to do though

any help?

Thanks!,
Dan

[laserlight]

PHP, like C, doesnt recognise that syntax.

You should use:

$long >= $Terayon_KW1_s && $long <= $Terayon_KW_e

[phisher1]

Since you replied so late (not complaing!) I went ahead and plugged in all the #'s manually. I have all my varaibles written though, so changing the numbers to variables shouldn't take that long. Thanks for your help in this. =)